destroy () 里面的 $this->user () 最好加上为空判断

public function destroy()
{
    $this->user()->token()->revoke();
    return $this->response->noContent();
}

改成

        if (!empty($this->user())) {
            $this->user()->token()->revoke();
            return $this->response->noContent();
        } else {
            return $this->response->errorUnauthorized('The token is invalid.');
        }