diff --git a/src/xenia/app/emulator_window.h b/src/xenia/app/emulator_window.h
index a39f7c91f..5a25518fe 100644
--- a/src/xenia/app/emulator_window.h
+++ b/src/xenia/app/emulator_window.h
@@ -95,9 +95,6 @@ class EmulatorWindow {
 
   void ToggleProfilesConfigDialog();
   void SetHotkeysState(bool enabled) { disable_hotkeys_ = !enabled; }
-  // We need to store it somewhere so there will be no situation when there are
-  // multiple instances opened.
-  std::unique_ptr<CreateProfileDialog> profile_creation_dialog_;
 
   // Types of button functions for hotkeys.
   enum class ButtonFunctions {
diff --git a/src/xenia/app/profile_dialogs.cc b/src/xenia/app/profile_dialogs.cc
index c38f259cd..2d623d906 100644
--- a/src/xenia/app/profile_dialogs.cc
+++ b/src/xenia/app/profile_dialogs.cc
@@ -11,29 +11,36 @@
 #include <algorithm>
 #include "xenia/app/emulator_window.h"
 #include "xenia/base/system.h"
+#include "xenia/kernel/util/shim_utils.h"
 
 namespace xe {
+namespace kernel {
+namespace xam {
+extern bool xeDrawProfileContent(ui::ImGuiDrawer* imgui_drawer,
+                                 const uint64_t xuid, const uint8_t user_index,
+                                 const X_XAMACCOUNTINFO* account,
+                                 uint64_t* selected_xuid);
+}
+}  // namespace kernel
 namespace app {
 
 void CreateProfileDialog::OnDraw(ImGuiIO& io) {
+  if (!has_opened_) {
+    ImGui::OpenPopup("Create Profile");
+    has_opened_ = true;
+  }
+
   auto profile_manager = emulator_window_->emulator()
                              ->kernel_state()
                              ->xam_state()
                              ->profile_manager();
 
-  const auto window_position =
-      ImVec2(GetIO().DisplaySize.x * 0.40f, GetIO().DisplaySize.y * 0.44f);
-
-  ImGui::SetNextWindowPos(window_position, ImGuiCond_FirstUseEver);
-  ImGui::SetNextWindowBgAlpha(1.0f);
-
   bool dialog_open = true;
-  if (!ImGui::Begin("Create Profile", &dialog_open,
-                    ImGuiWindowFlags_NoCollapse |
-                        ImGuiWindowFlags_AlwaysAutoResize |
-                        ImGuiWindowFlags_HorizontalScrollbar)) {
-    ImGui::End();
-    emulator_window_->profile_creation_dialog_.reset();
+  if (!ImGui::BeginPopupModal("Create Profile", &dialog_open,
+                              ImGuiWindowFlags_NoCollapse |
+                                  ImGuiWindowFlags_AlwaysAutoResize |
+                                  ImGuiWindowFlags_HorizontalScrollbar)) {
+    Close();
     return;
   }
 
@@ -43,33 +50,37 @@ void CreateProfileDialog::OnDraw(ImGuiIO& io) {
   }
 
   ImGui::TextUnformatted("Gamertag:");
-  ImGui::InputText("##Gamertag", gamertag, sizeof(gamertag));
+  ImGui::InputText("##Gamertag", gamertag_, sizeof(gamertag_));
 
-  const std::string gamertag_string = std::string(gamertag);
+  const std::string gamertag_string = std::string(gamertag_);
+  bool valid = profile_manager->IsGamertagValid(gamertag_string);
 
-  if (profile_manager->IsGamertagValid(gamertag_string)) {
-    if (ImGui::Button("Create")) {
-      if (profile_manager->CreateProfile(gamertag_string, migration) &&
-          migration) {
-        emulator_window_->emulator()->DataMigration(0xB13EBABEBABEBABE);
-      }
-      std::fill(std::begin(gamertag), std::end(gamertag), '\0');
-      dialog_open = false;
+  ImGui::BeginDisabled(!valid);
+  if (ImGui::Button("Create")) {
+    bool autologin = (profile_manager->GetProfilesCount() == 0);
+    if (profile_manager->CreateProfile(gamertag_string, autologin,
+                                       migration_) &&
+        migration_) {
+      emulator_window_->emulator()->DataMigration(0xB13EBABEBABEBABE);
     }
-    ImGui::SameLine();
+    std::fill(std::begin(gamertag_), std::end(gamertag_), '\0');
+    dialog_open = false;
   }
+  ImGui::EndDisabled();
+  ImGui::SameLine();
 
   if (ImGui::Button("Cancel")) {
-    std::fill(std::begin(gamertag), std::end(gamertag), '\0');
+    std::fill(std::begin(gamertag_), std::end(gamertag_), '\0');
     dialog_open = false;
   }
 
   if (!dialog_open) {
-    ImGui::End();
-    emulator_window_->profile_creation_dialog_.reset();
+    ImGui::CloseCurrentPopup();
+    Close();
+    ImGui::EndPopup();
     return;
   }
-  ImGui::End();
+  ImGui::EndPopup();
 }
 
 void NoProfileDialog::OnDraw(ImGuiIO& io) {
@@ -112,18 +123,14 @@ void NoProfileDialog::OnDraw(ImGuiIO& io) {
       emulator_window_->emulator()->content_root());
 
   if (content_files.empty()) {
-    if (ImGui::Button("Create Profile") &&
-        !emulator_window_->profile_creation_dialog_) {
-      emulator_window_->profile_creation_dialog_ =
-          std::make_unique<CreateProfileDialog>(
-              emulator_window_->imgui_drawer(), emulator_window_);
+    if (ImGui::Button("Create Profile")) {
+      new CreateProfileDialog(emulator_window_->imgui_drawer(),
+                              emulator_window_);
     }
   } else {
-    if (ImGui::Button("Create profile & migrate data") &&
-        !emulator_window_->profile_creation_dialog_) {
-      emulator_window_->profile_creation_dialog_ =
-          std::make_unique<CreateProfileDialog>(
-              emulator_window_->imgui_drawer(), emulator_window_, true);
+    if (ImGui::Button("Create profile & migrate data")) {
+      new CreateProfileDialog(emulator_window_->imgui_drawer(),
+                              emulator_window_, true);
     }
   }
 
@@ -183,7 +190,8 @@ void ProfileConfigDialog::OnDraw(ImGuiIO& io) {
     const uint8_t user_index =
         profile_manager->GetUserIndexAssignedToProfile(xuid);
 
-    if (!DrawProfileContent(xuid, user_index, &account)) {
+    if (!kernel::xam::xeDrawProfileContent(imgui_drawer(), xuid, user_index,
+                                           &account, &selected_xuid_)) {
       ImGui::PopID();
       ImGui::End();
       return;
@@ -196,11 +204,8 @@ void ProfileConfigDialog::OnDraw(ImGuiIO& io) {
 
   ImGui::Spacing();
 
-  if (ImGui::Button("Create Profile") &&
-      !emulator_window_->profile_creation_dialog_) {
-    emulator_window_->profile_creation_dialog_ =
-        std::make_unique<CreateProfileDialog>(emulator_window_->imgui_drawer(),
-                                              emulator_window_);
+  if (ImGui::Button("Create Profile")) {
+    new CreateProfileDialog(emulator_window_->imgui_drawer(), emulator_window_);
   }
 
   ImGui::End();
@@ -211,131 +216,5 @@ void ProfileConfigDialog::OnDraw(ImGuiIO& io) {
   }
 }
 
-bool ProfileConfigDialog::DrawProfileContent(const uint64_t xuid,
-                                             const uint8_t user_index,
-                                             const X_XAMACCOUNTINFO* account) {
-  auto profile_manager = emulator_window_->emulator()
-                             ->kernel_state()
-                             ->xam_state()
-                             ->profile_manager();
-
-  const float default_image_size = 75.0f;
-  auto position = ImGui::GetCursorPos();
-  const float selectable_height =
-      ImGui::GetTextLineHeight() *
-      5;  // 3 is for amount of lines of text behind image/object.
-  const auto font = emulator_window_->imgui_drawer()->GetIO().Fonts->Fonts[0];
-
-  const auto text_size = font->CalcTextSizeA(
-      font->FontSize, FLT_MAX, -1.0f,
-      fmt::format("XUID: {:016X}\n", 0xB13EBABEBABEBABE).c_str());
-
-  const auto image_scale = selectable_height / default_image_size;
-  const auto image_size = ImVec2(default_image_size * image_scale,
-                                 default_image_size * image_scale);
-  // This includes 10% to include empty spaces between border and elements.
-  auto selectable_region_size =
-      ImVec2((image_size.x + text_size.x) * 1.10f, selectable_height);
-
-  if (ImGui::Selectable("##Selectable", selected_xuid_ == xuid,
-                        ImGuiSelectableFlags_SpanAllColumns,
-                        selectable_region_size)) {
-    selected_xuid_ = xuid;
-  }
-
-  if (ImGui::BeginPopupContextItem("Profile Menu")) {
-    if (user_index == static_cast<uint8_t>(-1)) {
-      if (ImGui::MenuItem("Login")) {
-        profile_manager->Login(xuid);
-      }
-
-      if (ImGui::BeginMenu("Login to slot:")) {
-        for (uint8_t i = 0; i < XUserMaxUserCount; i++) {
-          if (ImGui::MenuItem(fmt::format("slot {}", i).c_str())) {
-            profile_manager->Login(xuid, i);
-          }
-        }
-        ImGui::EndMenu();
-      }
-    } else {
-      if (ImGui::MenuItem("Logout")) {
-        profile_manager->Logout(user_index);
-      }
-    }
-
-    ImGui::MenuItem("Modify (unsupported)");
-    ImGui::MenuItem("Show Achievements (unsupported)");
-
-    if (ImGui::MenuItem("Show Content Directory")) {
-      const auto path = profile_manager->GetProfileContentPath(
-          xuid, emulator_window_->emulator()->kernel_state()->title_id());
-
-      if (!std::filesystem::exists(path)) {
-        std::filesystem::create_directories(path);
-      }
-
-      std::thread path_open(LaunchFileExplorer, path);
-      path_open.detach();
-    }
-
-    if (!emulator_window_->emulator()->is_title_open()) {
-      ImGui::Separator();
-      if (ImGui::BeginMenu("Delete Profile")) {
-        ImGui::BeginTooltip();
-        ImGui::TextUnformatted(
-            fmt::format("You're about to delete profile: {} (XUID: {:016X}). "
-                        "This will remove all data assigned to this profile "
-                        "including savefiles. Are you sure?",
-                        account->GetGamertagString(), xuid)
-                .c_str());
-        ImGui::EndTooltip();
-
-        if (ImGui::MenuItem("Yes, delete it!")) {
-          profile_manager->DeleteProfile(xuid);
-          ImGui::EndMenu();
-          ImGui::EndPopup();
-          return false;
-        }
-
-        ImGui::EndMenu();
-      }
-    }
-    ImGui::EndPopup();
-  }
-
-  ImGui::SameLine();
-  ImGui::SetCursorPos(position);
-
-  // In the future it can be replaced with profile icon.
-  ImGui::Image(user_index < XUserMaxUserCount
-                   ? imgui_drawer()->GetNotificationIcon(user_index)
-                   : nullptr,
-               ImVec2(default_image_size * image_scale,
-                      default_image_size * image_scale));
-
-  ImGui::SameLine();
-  position = ImGui::GetCursorPos();
-  ImGui::TextUnformatted(
-      fmt::format("User: {}\n", account->GetGamertagString()).c_str());
-
-  ImGui::SameLine();
-  ImGui::SetCursorPos(position);
-  ImGui::SetCursorPosY(position.y + ImGui::GetTextLineHeight());
-  ImGui::TextUnformatted(fmt::format("XUID: {:016X}\n", xuid).c_str());
-
-  ImGui::SameLine();
-  ImGui::SetCursorPos(position);
-  ImGui::SetCursorPosY(position.y + 2 * ImGui::GetTextLineHeight());
-
-  if (user_index != static_cast<uint8_t>(-1)) {
-    ImGui::TextUnformatted(
-        fmt::format("Assigned to slot: {}\n", user_index + 1).c_str());
-  } else {
-    ImGui::TextUnformatted(fmt::format("Profile is not signed in").c_str());
-  }
-
-  return true;
-}
-
 }  // namespace app
 }  // namespace xe
\ No newline at end of file
diff --git a/src/xenia/app/profile_dialogs.h b/src/xenia/app/profile_dialogs.h
index a8a9708b3..d9f4b3c0c 100644
--- a/src/xenia/app/profile_dialogs.h
+++ b/src/xenia/app/profile_dialogs.h
@@ -26,15 +26,16 @@ class CreateProfileDialog final : public ui::ImGuiDialog {
                       bool with_migration = false)
       : ui::ImGuiDialog(imgui_drawer),
         emulator_window_(emulator_window),
-        migration(with_migration) {
-    memset(gamertag, 0, sizeof(gamertag));
+        migration_(with_migration) {
+    memset(gamertag_, 0, sizeof(gamertag_));
   }
 
  protected:
   void OnDraw(ImGuiIO& io) override;
 
-  bool migration = false;
-  char gamertag[16] = "";
+  bool has_opened_ = false;
+  bool migration_ = false;
+  char gamertag_[16] = "";
   EmulatorWindow* emulator_window_;
 };
 
@@ -54,19 +55,13 @@ class ProfileConfigDialog final : public ui::ImGuiDialog {
  public:
   ProfileConfigDialog(ui::ImGuiDrawer* imgui_drawer,
                       EmulatorWindow* emulator_window)
-      : ui::ImGuiDialog(imgui_drawer), emulator_window_(emulator_window) {
-    memset(gamertag, 0, sizeof(gamertag));
-  }
+      : ui::ImGuiDialog(imgui_drawer), emulator_window_(emulator_window) {}
 
  protected:
   void OnDraw(ImGuiIO& io) override;
 
  private:
-  bool DrawProfileContent(const uint64_t xuid, const uint8_t user_index,
-                          const X_XAMACCOUNTINFO* account);
-
   uint64_t selected_xuid_ = 0;
-  char gamertag[16] = "";
   EmulatorWindow* emulator_window_;
 };
 
diff --git a/src/xenia/kernel/xam/profile_manager.cc b/src/xenia/kernel/xam/profile_manager.cc
index 98ab18a12..35399e1f3 100644
--- a/src/xenia/kernel/xam/profile_manager.cc
+++ b/src/xenia/kernel/xam/profile_manager.cc
@@ -254,7 +254,8 @@ bool ProfileManager::DismountProfile(const uint64_t xuid) {
       fmt::format("{:016X}", xuid) + ':');
 }
 
-void ProfileManager::Login(const uint64_t xuid, const uint8_t user_index) {
+void ProfileManager::Login(const uint64_t xuid, const uint8_t user_index,
+                           bool notify) {
   if (logged_profiles_.size() >= 4 && user_index >= XUserMaxUserCount) {
     XELOGE(
         "Cannot login account with XUID: {:016X} due to lack of free slots "
@@ -293,23 +294,39 @@ void ProfileManager::Login(const uint64_t xuid, const uint8_t user_index) {
 
   logged_profiles_[assigned_user_slot] =
       std::make_unique<UserProfile>(xuid, &profile);
-  kernel_state_->BroadcastNotification(kXNotificationIDSystemSignInChanged,
-                                       GetUsedUserSlots().to_ulong());
+  if (notify) {
+    kernel_state_->BroadcastNotification(kXNotificationIDSystemSignInChanged,
+                                         GetUsedUserSlots().to_ulong());
+  }
   UpdateConfig(xuid, assigned_user_slot);
 }
 
-void ProfileManager::Logout(const uint8_t user_index) {
+void ProfileManager::Logout(const uint8_t user_index, bool notify) {
   auto profile = logged_profiles_.find(user_index);
   if (profile == logged_profiles_.cend()) {
     return;
   }
   DismountProfile(profile->second->xuid());
   logged_profiles_.erase(profile);
-  kernel_state_->BroadcastNotification(kXNotificationIDSystemSignInChanged,
-                                       GetUsedUserSlots().to_ulong());
+  if (notify) {
+    kernel_state_->BroadcastNotification(kXNotificationIDSystemSignInChanged,
+                                         GetUsedUserSlots().to_ulong());
+  }
   UpdateConfig(0, user_index);
 }
 
+void ProfileManager::LoginMultiple(
+    const std::map<uint8_t, uint64_t>& profiles) {
+  int slots_mask = 0;
+  for (auto [slot, xuid] : profiles) {
+    Login(xuid, slot, false);
+    slots_mask |= (1 << slot);
+  }
+
+  kernel_state_->BroadcastNotification(kXNotificationIDSystemSignInChanged,
+                                       slots_mask);
+}
+
 std::vector<uint64_t> ProfileManager::FindProfiles() const {
   // Info: Profile directory name is also it's offline xuid
   std::vector<uint64_t> profiles_xuids;
@@ -410,7 +427,7 @@ std::filesystem::path ProfileManager::GetProfilePath(
          fmt::format("{:08X}", XContentType::kProfile) / xuid;
 }
 
-bool ProfileManager::CreateProfile(const std::string gamertag,
+bool ProfileManager::CreateProfile(const std::string gamertag, bool autologin,
                                    bool default_xuid) {
   const auto xuid = !default_xuid ? GenerateXuid() : 0xB13EBABEBABEBABE;
 
@@ -423,7 +440,7 @@ bool ProfileManager::CreateProfile(const std::string gamertag,
   }
 
   const bool is_account_created = CreateAccount(xuid, gamertag);
-  if (is_account_created) {
+  if (is_account_created && autologin) {
     Login(xuid);
   }
   return is_account_created;
diff --git a/src/xenia/kernel/xam/profile_manager.h b/src/xenia/kernel/xam/profile_manager.h
index cb326b3a8..76f5a86f1 100644
--- a/src/xenia/kernel/xam/profile_manager.h
+++ b/src/xenia/kernel/xam/profile_manager.h
@@ -79,15 +79,18 @@ class ProfileManager {
 
   ~ProfileManager();
 
-  bool CreateProfile(const std::string gamertag, bool default_xuid = false);
+  bool CreateProfile(const std::string gamertag, bool autologin,
+                     bool default_xuid = false);
   // bool CreateProfile(const X_XAMACCOUNTINFO* account_info);
   bool DeleteProfile(const uint64_t xuid);
 
   bool MountProfile(const uint64_t xuid);
   bool DismountProfile(const uint64_t xuid);
 
-  void Login(const uint64_t xuid, const uint8_t user_index = -1);
-  void Logout(const uint8_t user_index);
+  void Login(const uint64_t xuid, const uint8_t user_index = -1,
+             bool notify = true);
+  void Logout(const uint8_t user_index, bool notify = true);
+  void LoginMultiple(const std::map<uint8_t, uint64_t>& profiles);
 
   bool LoadAccount(const uint64_t xuid);
   void LoadAccounts(const std::vector<uint64_t> profiles_xuids);
diff --git a/src/xenia/kernel/xam/xam_ui.cc b/src/xenia/kernel/xam/xam_ui.cc
index 4b57ad1e1..5175cea02 100644
--- a/src/xenia/kernel/xam/xam_ui.cc
+++ b/src/xenia/kernel/xam/xam_ui.cc
@@ -10,7 +10,9 @@
 #include "third_party/imgui/imgui.h"
 #include "xenia/base/logging.h"
 #include "xenia/base/string_util.h"
+#include "xenia/base/system.h"
 #include "xenia/emulator.h"
+#include "xenia/hid/input_system.h"
 #include "xenia/kernel/kernel_flags.h"
 #include "xenia/kernel/kernel_state.h"
 #include "xenia/kernel/util/shim_utils.h"
@@ -819,38 +821,415 @@ dword_result_t XamShowMarketplaceDownloadItemsUI_entry(
 }
 DECLARE_XAM_EXPORT1(XamShowMarketplaceDownloadItemsUI, kUI, kSketchy);
 
-dword_result_t XamShowSigninUI_entry(dword_t users_needed, dword_t unk_mask) {
-  // XN_SYS_UI (on)
-  kernel_state()->BroadcastNotification(kXNotificationIDSystemUI, 1);
-  // Mask values vary. Probably matching user types? Local/remote?
-  // Games seem to sit and loop until we trigger this notification:
+bool xeDrawProfileContent(ui::ImGuiDrawer* imgui_drawer, const uint64_t xuid,
+                          const uint8_t user_index,
+                          const X_XAMACCOUNTINFO* account,
+                          uint64_t* selected_xuid) {
+  auto profile_manager = kernel_state()->xam_state()->profile_manager();
 
-  auto run = [users_needed]() -> void {
-    uint32_t user_mask = 0;
-    uint32_t active_users = 0;
+  const float default_image_size = 75.0f;
+  auto position = ImGui::GetCursorPos();
+  const float selectable_height =
+      ImGui::GetTextLineHeight() *
+      5;  // 3 is for amount of lines of text behind image/object.
+  const auto font = imgui_drawer->GetIO().Fonts->Fonts[0];
 
-    for (uint32_t i = 0; i < XUserMaxUserCount; i++) {
-      if (kernel_state()->xam_state()->IsUserSignedIn(i)) {
-        user_mask |= (1 << i);
-        active_users++;
-        if (active_users >= users_needed) break;
-      }
+  const auto text_size = font->CalcTextSizeA(
+      font->FontSize, FLT_MAX, -1.0f,
+      fmt::format("XUID: {:016X}\n", 0xB13EBABEBABEBABE).c_str());
+
+  const auto image_scale = selectable_height / default_image_size;
+  const auto image_size = ImVec2(default_image_size * image_scale,
+                                 default_image_size * image_scale);
+
+  if (xuid && selected_xuid) {
+    // This includes 10% to include empty spaces between border and elements.
+    auto selectable_region_size =
+        ImVec2((image_size.x + text_size.x) * 1.10f, selectable_height);
+
+    if (ImGui::Selectable("##Selectable", *selected_xuid == xuid,
+                          ImGuiSelectableFlags_SpanAllColumns,
+                          selectable_region_size)) {
+      *selected_xuid = xuid;
     }
 
-    std::this_thread::sleep_for(std::chrono::milliseconds(150));
-    // XN_SYS_SIGNINCHANGED (players)
-    kernel_state()->BroadcastNotification(kXNotificationIDSystemSignInChanged,
-                                          user_mask);
-    // XN_SYS_UI (off)
-    kernel_state()->BroadcastNotification(kXNotificationIDSystemUI, 0);
-  };
+    if (ImGui::BeginPopupContextItem("Profile Menu")) {
+      if (user_index == static_cast<uint8_t>(-1)) {
+        if (ImGui::MenuItem("Login")) {
+          profile_manager->Login(xuid);
+        }
 
-  std::thread thread(run);
-  thread.detach();
+        if (ImGui::BeginMenu("Login to slot:")) {
+          for (uint8_t i = 0; i < XUserMaxUserCount; i++) {
+            if (ImGui::MenuItem(fmt::format("slot {}", i).c_str())) {
+              profile_manager->Login(xuid, i);
+            }
+          }
+          ImGui::EndMenu();
+        }
+      } else {
+        if (ImGui::MenuItem("Logout")) {
+          profile_manager->Logout(user_index);
+        }
+      }
 
-  return X_ERROR_SUCCESS;
+      ImGui::MenuItem("Modify (unsupported)");
+      ImGui::MenuItem("Show Achievements (unsupported)");
+
+      if (ImGui::MenuItem("Show Content Directory")) {
+        const auto path = profile_manager->GetProfileContentPath(
+            xuid, kernel_state()->title_id());
+
+        if (!std::filesystem::exists(path)) {
+          std::filesystem::create_directories(path);
+        }
+
+        std::thread path_open(LaunchFileExplorer, path);
+        path_open.detach();
+      }
+
+      if (!kernel_state()->emulator()->is_title_open()) {
+        ImGui::Separator();
+        if (ImGui::BeginMenu("Delete Profile")) {
+          ImGui::BeginTooltip();
+          ImGui::TextUnformatted(
+              fmt::format("You're about to delete profile: {} (XUID: {:016X}). "
+                          "This will remove all data assigned to this profile "
+                          "including savefiles. Are you sure?",
+                          account->GetGamertagString(), xuid)
+                  .c_str());
+          ImGui::EndTooltip();
+
+          if (ImGui::MenuItem("Yes, delete it!")) {
+            profile_manager->DeleteProfile(xuid);
+            ImGui::EndMenu();
+            ImGui::EndPopup();
+            return false;
+          }
+
+          ImGui::EndMenu();
+        }
+      }
+      ImGui::EndPopup();
+    }
+  }
+
+  ImGui::SameLine();
+  ImGui::SetCursorPos(position);
+
+  // In the future it can be replaced with profile icon.
+  ImGui::Image(user_index < XUserMaxUserCount
+                   ? imgui_drawer->GetNotificationIcon(user_index)
+                   : nullptr,
+               ImVec2(default_image_size * image_scale,
+                      default_image_size * image_scale));
+
+  ImGui::SameLine();
+  position = ImGui::GetCursorPos();
+  ImGui::TextUnformatted(
+      fmt::format("User: {}\n", account->GetGamertagString()).c_str());
+
+  ImGui::SameLine();
+  ImGui::SetCursorPos(position);
+  ImGui::SetCursorPosY(position.y + ImGui::GetTextLineHeight());
+  ImGui::TextUnformatted(fmt::format("XUID: {:016X}\n", xuid).c_str());
+
+  ImGui::SameLine();
+  ImGui::SetCursorPos(position);
+  ImGui::SetCursorPosY(position.y + 2 * ImGui::GetTextLineHeight());
+
+  if (user_index != static_cast<uint8_t>(-1)) {
+    ImGui::TextUnformatted(
+        fmt::format("Assigned to slot: {}\n", user_index + 1).c_str());
+  } else {
+    ImGui::TextUnformatted(fmt::format("Profile is not signed in").c_str());
+  }
+
+  return true;
 }
-DECLARE_XAM_EXPORT1(XamShowSigninUI, kUserProfiles, kStub);
+
+class SigninDialog : public XamDialog {
+ public:
+  SigninDialog(xe::ui::ImGuiDrawer* imgui_drawer, uint32_t users_needed)
+      : XamDialog(imgui_drawer),
+        users_needed_(users_needed),
+        title_("Sign In") {
+    last_user_ = kernel_state()->emulator()->input_system()->GetLastUsedSlot();
+
+    for (uint8_t slot = 0; slot < XUserMaxUserCount; slot++) {
+      std::string name = fmt::format("Slot {:d}", slot + 1);
+      slot_data_.push_back({slot, name});
+    }
+  }
+
+  virtual ~SigninDialog() {}
+
+  void OnDraw(ImGuiIO& io) override {
+    bool first_draw = false;
+    if (!has_opened_) {
+      ImGui::OpenPopup(title_.c_str());
+      has_opened_ = true;
+      first_draw = true;
+      ReloadProfiles(true);
+    }
+    if (ImGui::BeginPopupModal(title_.c_str(), nullptr,
+                               ImGuiWindowFlags_AlwaysAutoResize)) {
+      auto profile_manager = kernel_state()->xam_state()->profile_manager();
+      auto profiles = profile_manager->GetProfiles();
+
+      for (uint32_t i = 0; i < users_needed_; i++) {
+        ImGui::BeginGroup();
+
+        std::vector<const char*> combo_items;
+        int items_count = 0;
+        int current_item = 0;
+
+        // Fill slot list.
+        std::vector<uint8_t> slots;
+        slots.push_back(0xFF);
+        combo_items.push_back("---");
+        for (auto& elem : slot_data_) {
+          // Select the slot or skip it if it's already used.
+          bool already_taken = false;
+          for (uint32_t j = 0; j < users_needed_; j++) {
+            if (chosen_slots_[j] == elem.first) {
+              if (i == j) {
+                current_item = static_cast<int>(combo_items.size());
+              } else {
+                already_taken = true;
+              }
+              break;
+            }
+          }
+
+          if (already_taken) {
+            continue;
+          }
+
+          slots.push_back(elem.first);
+          combo_items.push_back(elem.second.c_str());
+        }
+        items_count = static_cast<int>(combo_items.size());
+
+        ImGui::BeginDisabled(users_needed_ == 1);
+        ImGui::Combo(fmt::format("##Slot{:d}", i).c_str(), &current_item,
+                     combo_items.data(), items_count);
+        chosen_slots_[i] = slots[current_item];
+        ImGui::EndDisabled();
+        ImGui::Spacing();
+
+        combo_items.clear();
+        current_item = 0;
+
+        // Fill profile list.
+        std::vector<uint64_t> xuids;
+        xuids.push_back(0);
+        combo_items.push_back("---");
+        if (chosen_slots_[i] != 0xFF) {
+          for (auto& elem : profile_data_) {
+            // Select the profile or skip it if it's already used.
+            bool already_taken = false;
+            for (uint32_t j = 0; j < users_needed_; j++) {
+              if (chosen_xuids_[j] == elem.first) {
+                if (i == j) {
+                  current_item = static_cast<int>(combo_items.size());
+                } else {
+                  already_taken = true;
+                }
+                break;
+              }
+            }
+
+            if (already_taken) {
+              continue;
+            }
+
+            xuids.push_back(elem.first);
+            combo_items.push_back(elem.second.c_str());
+          }
+        }
+        items_count = static_cast<int>(combo_items.size());
+
+        ImGui::BeginDisabled(chosen_slots_[i] == 0xFF);
+        ImGui::Combo(fmt::format("##Profile{:d}", i).c_str(), &current_item,
+                     combo_items.data(), items_count);
+        chosen_xuids_[i] = xuids[current_item];
+        ImGui::EndDisabled();
+        ImGui::Spacing();
+
+        // Draw profile badge.
+        uint8_t slot = chosen_slots_[i];
+        uint64_t xuid = chosen_xuids_[i];
+
+        if (slot == 0xFF || xuid == 0 || profiles->count(xuid) == 0) {
+          float ypos = ImGui::GetCursorPosY();
+          ImGui::SetCursorPosY(ypos + ImGui::GetTextLineHeight() * 5);
+        } else {
+          const X_XAMACCOUNTINFO* account = &profiles->at(xuid);
+          xeDrawProfileContent(imgui_drawer(), xuid, slot, account, nullptr);
+        }
+
+        ImGui::EndGroup();
+        if (i != (users_needed_ - 1) && (i == 0 || i == 2)) {
+          ImGui::SameLine();
+        }
+      }
+
+      ImGui::Spacing();
+
+      if (ImGui::Button("Create Profile")) {
+        creating_profile_ = true;
+        ImGui::OpenPopup("Create Profile");
+        first_draw = true;
+      }
+      ImGui::Spacing();
+
+      if (creating_profile_) {
+        if (ImGui::BeginPopupModal("Create Profile", nullptr,
+                                   ImGuiWindowFlags_NoCollapse |
+                                       ImGuiWindowFlags_AlwaysAutoResize |
+                                       ImGuiWindowFlags_HorizontalScrollbar)) {
+          if (first_draw) {
+            ImGui::SetKeyboardFocusHere();
+          }
+
+          ImGui::TextUnformatted("Gamertag:");
+          ImGui::InputText("##Gamertag", gamertag_, sizeof(gamertag_));
+
+          const std::string gamertag_string = gamertag_;
+          bool valid = profile_manager->IsGamertagValid(gamertag_string);
+
+          ImGui::BeginDisabled(!valid);
+          if (ImGui::Button("Create")) {
+            profile_manager->CreateProfile(gamertag_string, false);
+            std::fill(std::begin(gamertag_), std::end(gamertag_), '\0');
+            ImGui::CloseCurrentPopup();
+            creating_profile_ = false;
+            ReloadProfiles(false);
+          }
+          ImGui::EndDisabled();
+          ImGui::SameLine();
+
+          if (ImGui::Button("Cancel")) {
+            std::fill(std::begin(gamertag_), std::end(gamertag_), '\0');
+            ImGui::CloseCurrentPopup();
+            creating_profile_ = false;
+          }
+
+          ImGui::EndPopup();
+        } else {
+          creating_profile_ = false;
+        }
+      }
+
+      if (ImGui::Button("OK")) {
+        std::map<uint8_t, uint64_t> profile_map;
+        for (uint32_t i = 0; i < users_needed_; i++) {
+          uint8_t slot = chosen_slots_[i];
+          uint64_t xuid = chosen_xuids_[i];
+          if (slot != 0xFF && xuid != 0) {
+            profile_map[slot] = xuid;
+          }
+        }
+        profile_manager->LoginMultiple(profile_map);
+
+        ImGui::CloseCurrentPopup();
+        Close();
+      }
+      ImGui::SameLine();
+
+      if (ImGui::Button("Cancel")) {
+        ImGui::CloseCurrentPopup();
+        Close();
+      }
+
+      ImGui::Spacing();
+      ImGui::Spacing();
+      ImGui::EndPopup();
+    } else {
+      Close();
+    }
+  }
+
+  void ReloadProfiles(bool first_draw) {
+    auto profile_manager = kernel_state()->xam_state()->profile_manager();
+    auto profiles = profile_manager->GetProfiles();
+
+    profile_data_.clear();
+    for (auto& [xuid, account] : *profiles) {
+      profile_data_.push_back({xuid, account.GetGamertagString()});
+    }
+
+    if (first_draw) {
+      // If only one user is requested, request last used controller to sign in.
+      if (users_needed_ == 1) {
+        chosen_slots_[0] = last_user_;
+      } else {
+        for (uint32_t i = 0; i < users_needed_; i++) {
+          // TODO: Not sure about this, needs testing on real hardware.
+          chosen_slots_[i] = i;
+        }
+      }
+
+      // Default profile selection to profile that is already signed in.
+      for (auto& elem : profile_data_) {
+        uint64_t xuid = elem.first;
+        uint8_t slot = profile_manager->GetUserIndexAssignedToProfile(xuid);
+        for (uint32_t j = 0; j < users_needed_; j++) {
+          if (chosen_slots_[j] != 0xFF && slot == chosen_slots_[j]) {
+            chosen_xuids_[j] = xuid;
+          }
+        }
+      }
+    }
+  }
+
+ private:
+  bool has_opened_ = false;
+  std::string title_;
+  uint32_t users_needed_ = 1;
+  uint32_t last_user_ = 0;
+
+  std::vector<std::pair<uint8_t, std::string>> slot_data_;
+  std::vector<std::pair<uint64_t, std::string>> profile_data_;
+  uint8_t chosen_slots_[XUserMaxUserCount] = {};
+  uint64_t chosen_xuids_[XUserMaxUserCount] = {};
+
+  bool creating_profile_ = false;
+  char gamertag_[16] = "";
+};
+
+dword_result_t XamShowSigninUI_entry(dword_t users_needed, dword_t unk_mask) {
+  // Mask values vary. Probably matching user types? Local/remote?
+  // Games seem to sit and loop until we trigger sign in notification.
+  if (users_needed != 1 && users_needed != 2 && users_needed != 4) {
+    return X_ERROR_INVALID_PARAMETER;
+  }
+
+  if (cvars::headless) {
+    return xeXamDispatchHeadlessAsync([users_needed]() {
+      std::map<uint8_t, uint64_t> xuids;
+
+      for (uint32_t i = 0; i < XUserMaxUserCount; i++) {
+        UserProfile* profile = kernel_state()->xam_state()->GetUserProfile(i);
+        if (profile) {
+          xuids[i] = profile->xuid();
+          if (xuids.size() >= users_needed) break;
+        }
+      }
+
+      kernel_state()->xam_state()->profile_manager()->LoginMultiple(xuids);
+    });
+  }
+
+  auto close = [](SigninDialog* dialog) -> void {};
+
+  const Emulator* emulator = kernel_state()->emulator();
+  ui::ImGuiDrawer* imgui_drawer = emulator->imgui_drawer();
+  return xeXamDispatchDialogAsync<SigninDialog>(
+      new SigninDialog(imgui_drawer, users_needed), close);
+}
+DECLARE_XAM_EXPORT1(XamShowSigninUI, kUserProfiles, kImplemented);
 
 }  // namespace xam
 }  // namespace kernel