Cleaned up pagination in user and apikey controller. Extracted login start and start url generation to modular IOAuth2Provider interface. Improved login and register local oauth2 page

Moonlight.ApiServer/Http/Controllers/Admin/ApiKeys/ApiKeysController.cs

@@ -28,8 +28,8 @@ public class ApiKeysController : Controller
     [HttpGet]
     [Authorize(Policy = "permissions:admin.apikeys.get")]
     public async Task<IPagedData<ApiKeyResponse>> Get(
-        [FromQuery] int page,
-        [FromQuery] [Range(1, 100)] int pageSize = 50
+        [FromQuery] [Range(0, int.MaxValue)] int page,
+        [FromQuery] [Range(1, 100)] int pageSize
     )
     {
         var count = await ApiKeyRepository.Get().CountAsync();

Moonlight.ApiServer/Http/Controllers/Admin/Users/UsersController.cs

@@ -27,7 +27,7 @@ public class UsersController : Controller
     [Authorize(Policy = "permissions:admin.users.get")]
     public async Task<IPagedData<UserResponse>> Get(
         [FromQuery] [Range(0, int.MaxValue)] int page,
-        [FromQuery] [Range(1, 100)] int pageSize = 50
+        [FromQuery] [Range(1, 100)] int pageSize
     )
     {
         var count = await UserRepository.Get().CountAsync();