createCustomToken method response empty {}

[Phuong Phally (ភួង ផល្លី)]

I try to create custom token with https://firebase-php.readthedocs.io/en/5.x/authentication.html#id2 in Laravel project by write code below.

  $auth = Firebase::auth();
  $token = $auth->verifyIdToken($token);
  $uid = $token->claims()->get('sub');
  $user = $auth->getUser($uid);
  $additionalClaims = [
      'nationality' => 'kh',
  ];
  if($user) {
      $customToken =  $auth->createCustomToken($user->uid, $additionalClaims);
  }
            

• If I return response json $user it is display object user likes

{
  "uid": "oR58AIcn3TS69CL..........",
  "email": "[e-mail]",
  "emailVerified": false,
  "displayName": null,
  "photoUrl": null,
  "phoneNumber": null,
  "disabled": false,
  "metadata": {
    "createdAt": "2021-03-25T06:05:56+00:00",
    "lastLoginAt": "2021-03-25T10:04:09+00:00",
    "passwordUpdatedAt": {
      "date": "2021-03-25 06:05:56.899000",
      "timezone_type": 3,
      "timezone": "UTC"
    },
    "lastRefreshAt": {
      "date": "2021-03-25 10:04:11.653000",
      "timezone_type": 3,
      "timezone": "UTC"
    }
  },
  "providerData": [
    {
      "uid": "[e-mail]",
      "displayName": null,
      "email": "[e-mail]",
      "photoUrl": null,
      "providerId": "password",
      "phoneNumber": null
    }
  ],
  "passwordHash": "....",
  "passwordSalt": null,
  "customClaims": [],
  "tokensValidAfterTime": "2021-03-25T06:05:56+00:00",
  "tenantId": null
}

But when use $customToken it response empty json body

{}

If I try to cast to string $customTokenString = (string) $customToken it error like below

Error
Object of class Lcobucci\JWT\Token\Plain could not be converted to string

Please help me

[Jérôme Gamez]

$customTokenString = $customToken->toString();

should work. Thank you for bringing this up, the documentation needs an update to reflect the different usages depending on the installed version of lcobucci/jwt, will do this right after writing this comment ^^.

[Jérôme Gamez]

Here it is kreait/firebase-php@8b45c07