feat(server): better api error messages (for unhandled exceptions) (#4817)

* feat(server): better error messages

* chore: open api

* chore: remove debug log

* fix: syntax error

* fix: e2e test

mobile/lib/modules/login/services/oauth.service.dart

@@ -17,7 +17,7 @@ class OAuthService {
     // Resolve API server endpoint from user provided serverUrl
     await _apiService.resolveAndSetEndpoint(serverUrl);
 
-    return await _apiService.oAuthApi.generateConfig(
+    return await _apiService.oAuthApi.generateOAuthConfig(
       OAuthConfigDto(redirectUri: '$callbackUrlScheme:/'),
     );
   }
@@ -29,7 +29,7 @@ class OAuthService {
         callbackUrlScheme: callbackUrlScheme,
       );
 
-      return await _apiService.oAuthApi.callback(
+      return await _apiService.oAuthApi.finishOAuth(
         OAuthCallbackDto(
           url: result,
         ),