Return error when client headers are missing (issue #19)

Return an error response when headers are missing instead of waiting indefinitely

ExpressAPI/src/routes/AssignmentRoutes.ts

@@ -99,13 +99,13 @@ class AssignmentRoutes implements RoutesManager {
 
             if ( error instanceof AxiosError ) {
                 if ( error.response?.data.message.name && error.response.data.message.name === 'has already been taken' ) {
-                    return res.status(StatusCodes.CONFLICT).send();
+                    return req.session.sendResponse(res, StatusCodes.CONFLICT, {}, `Repository name has already been take`, DojoStatusCode.ASSIGNMENT_NAME_CONFLICT);
                 }
 
-                return res.status(error.response?.status ?? HttpStatusCode.InternalServerError).send();
+                return req.session.sendResponse(res, error.response?.status ?? HttpStatusCode.InternalServerError);
             }
 
-            return res.status(StatusCodes.INTERNAL_SERVER_ERROR).send();
+            return req.session.sendResponse(res, HttpStatusCode.InternalServerError);
         }
 
         await new Promise(resolve => setTimeout(resolve, Config.gitlab.repository.timeoutAfterCreation));