Jwt token unable to generate - php

Question

I am trying to generate a JWT Token in laravel. I am using Tymon. I am working in laravel 5.8 and I need to copy most of the stuff from 5.4 version.
This is what so far I have tried.
Controller
$payload = (object)array("userid" => $user->userid);
$extra = [
"userid" => $user->userid,
"username" => $user->username,
"useremail" => $user->useremail
];
$return = JWTAuth::fromUser($payload, $extra);
User.php
<?php
namespace App;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Tymon\JWTAuth\Contracts\JWTSubject;
class User extends Authenticatable implements JWTSubject
{
use Notifiable;
protected $fillable = [
'name', 'email', 'password',
];
protected $hidden = [
'password', 'remember_token',
];
protected $casts = [
'email_verified_at' => 'datetime',
];
public function getJWTIdentifier()
{
return $this->getKey();
}
public function getJWTCustomClaims()
{
return [];
}
}
I am trying this using postman where I am getting this error:
Symfony \ Component \ Debug \ Exception \ FatalThrowableError (E_RECOVERABLE_ERROR)
Argument 1 passed to Tymon\JWTAuth\JWT::fromUser() must be an instance of Tymon\JWTAuth\Contracts\JWTSubject, instance of stdClass given, called in

Answer 1

To Use JWT Auth in Laravel you must follow these steps -
Install in Composer.json via:
composer require tymon/jwt-auth
Add the service provider to the providers array in the config/app.php config
file as follows:
'providers' => [
...
Tymon\JWTAuth\Providers\LaravelServiceProvider::class,
]
Run the following command to publish the package config file:
php artisan vendor:publish --provider="Tymon\JWTAuth\Providers\LaravelServiceProvider"
You should now have a config/jwt.php file that allows you to configure the basics of this package.
Generate the secret Key via this command:
php artisan jwt:secret
this should update your .env file with something like:
JWT_SECRET=foobar
Then Update the User model as:
<?php
namespace App;
use Tymon\JWTAuth\Contracts\JWTSubject;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
class User extends Authenticatable implements JWTSubject
{
use Notifiable;
// Rest omitted for brevity
/**
* Get the identifier that will be stored in the subject claim of the JWT.
*
* #return mixed
*/
public function getJWTIdentifier()
{
return $this->getKey();
}
/**
* Return a key value array, containing any custom claims to be added to the JWT.
*
* #return array
*/
public function getJWTCustomClaims()
{
return [];
}
}
finally, configure the Auth guard in config/auth.php as:
'defaults' => [
'guard' => 'api',
'passwords' => 'users',
],
...
'guards' => [
'api' => [
'driver' => 'jwt',
'provider' => 'users',
],
],
Then You are ready to go..

Answer 2

As the error message says, you are passing a stdClass instance where JWTSubject instance is expected as the first parameter of the JWTAuth::fromUser method.
Have a look at this issue: github issue
The developers suggest to either pass User model or implementation of Tymon\JWTAuth\Contracts\JWTSubject interface