public static ResponseModel <T> Failed <T>(T entity, string message) => ResponseModel.Failed <T>(message).WithEntity(entity);
 public static ResponseModel <T> Failed <T>(string message) => ResponseModel.Failed <T>().WithMessage(message);
 public static ResponseModel <T> Failed <T>(T entity) => ResponseModel.Failed <T>().WithEntity(entity);
 public static ResponseModel Failed(string message) => ResponseModel.Failed().WithMessage(message);