Implemented First User Admin Feature

Moonlight.ApiServer/Configuration/AppConfiguration.cs

@@ -44,6 +44,8 @@ public class AppConfiguration
             public string? AuthorizationEndpoint { get; set; }
             public string? AccessEndpoint { get; set; }
             public string? AuthorizationRedirect { get; set; }
+
+            public bool FirstUserAdmin { get; set; } = true;
         }
     }
     

Moonlight.ApiServer/Http/Controllers/OAuth2/OAuth2Controller.cs

@@ -278,9 +278,18 @@ public class OAuth2Controller : Controller
         {
             Username = username,
             Email = email,
-            Password = HashHelper.Hash(password)
+            Password = HashHelper.Hash(password),
         };
         
+        if (Configuration.Authentication.OAuth2.FirstUserAdmin)
+        {
+            var userCount = await UserRepository.Get().CountAsync();
+            
+            if (userCount == 0)
+                user.PermissionsJson = "[\"*\"]";
+            
+        }
+
         return await UserRepository.Add(user);
     }