Reauth endpoint

exam/api/Login/Login.php

@@ -33,7 +33,7 @@ class Login extends Api
         case "NotFound":
           throw ApiError::notFound("user");
         case "Invalid":
-          throw ApiError::unauthorized("Invalid username or password");
+          throw ApiError::notAllowed("Invalid username or password");
         default:
           throw $err;
       }