Implement disabling of local oauth2 controller

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

@@ -43,6 +43,9 @@ public class OAuth2Controller : Controller
         [FromQuery(Name = "view")] string view = "login"
     )
     {
+        if (!Configuration.Authentication.EnableLocalOAuth2)
+            throw new HttpApiException("Local OAuth2 has been disabled", 403);
+
         if (Configuration.Authentication.OAuth2.ClientId != clientId ||
             redirectUri != ExpectedRedirectUri ||
             responseType != "code")
@@ -88,6 +91,9 @@ public class OAuth2Controller : Controller
         [FromQuery(Name = "view")] string view = "login"
     )
     {
+        if (!Configuration.Authentication.EnableLocalOAuth2)
+            throw new HttpApiException("Local OAuth2 has been disabled", 403);
+
         if (Configuration.Authentication.OAuth2.ClientId != clientId ||
             redirectUri != ExpectedRedirectUri ||
             responseType != "code")
@@ -161,6 +167,9 @@ public class OAuth2Controller : Controller
         [FromForm(Name = "client_id")] string clientId
     )
     {
+        if (!Configuration.Authentication.EnableLocalOAuth2)
+            throw new HttpApiException("Local OAuth2 has been disabled", 403);
+
         // Check header
         if (!Request.Headers.ContainsKey("Authorization"))
             throw new HttpApiException("You are missing the Authorization header", 400);
@@ -227,7 +236,7 @@ public class OAuth2Controller : Controller
         };
     }
 
-    private async Task<string> GenerateCode(User user)
+    private Task<string> GenerateCode(User user)
     {
         var securityTokenDescriptor = new SecurityTokenDescriptor()
         {
@@ -252,7 +261,9 @@ public class OAuth2Controller : Controller
         var jwtSecurityTokenHandler = new JwtSecurityTokenHandler();
         var securityToken = jwtSecurityTokenHandler.CreateToken(securityTokenDescriptor);
 
-        return jwtSecurityTokenHandler.WriteToken(securityToken);
+        return Task.FromResult(
+            jwtSecurityTokenHandler.WriteToken(securityToken)
+        );
     }
 
     private async Task<User> Register(string username, string email, string password)
@@ -270,9 +281,7 @@ public class OAuth2Controller : Controller
             Password = HashHelper.Hash(password)
         };
 
-        var finalUser = await UserRepository.Add(user);
+        return await UserRepository.Add(user);
-
-        return finalUser;
     }
 
     private async Task<User> Login(string email, string password)