“调用成员函数forceFill（）为null时”调用$ user-> createToken（'Foo'）-> accessToken时出错

Question

Laravel 5.6.39 LARAVEL护照 这个错误每天只在生产服务器上发生，大约每天15-20次。用户每次尝试登录时都不会间歇性地发生这种情况。 我的代码：

  $user = Auth::user();
    $accessToken=$user->createToken('MyApp')->accessToken;

以下错误

{
"message": "Call to a member function forceFill() on null",
"exception": "Symfony\Component\Debug\Exception\FatalThrowableError",
"file": "/var/app/current/vendor/laravel/passport/src/PersonalAccessTokenFactory.php",
"line": 75,
"trace": [
{
"file": "/var/app/current/vendor/laravel/framework/src/Illuminate/Support/helpers.php",
"line": 1041,
"function": "Laravel\Passport{closure}",
"class": "Laravel\Passport\PersonalAccessTokenFactory",
"type": "->"
},
{
"file": "/var/app/current/vendor/laravel/passport/src/PersonalAccessTokenFactory.php",
"line": 79,
"function": "tap"
}