Jwt-auth: Token generation failing: Type error: Argument 2 passed to Lcobucci\\JWT\\Signer\\Hmac::createHash() must be an instance of Lcobucci\\JWT\\Signer\\Key, null given

[bigzoo]

Token generation failing

Login was previously working but seems to have been been broken.

Environment

| Bug? | yes
| Framework | Laravel
| Framework version | 5.5.*
| Package version | dev-develop 60103d1
| PHP version | 7.2

Steps to reproduce

Set up jwt auth set up as explained here.

Expected behaviour

Token should be generated.

Actual behaviour

{ "message": "Type error: Argument 2 passed to Lcobucci\\JWT\\Signer\\Hmac::createHash() must be an instance of Lcobucci\\JWT\\Signer\\Key, null given, called in .../app/vendor/lcobucci/jwt/src/Signer/BaseSigner.php on line 34", "status_code": 500 }

Controller

<?php
namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Requests\LoginRequest;
use App\Exceptions\InvalidCredentials;
use Tymon\JWTAuth\JWTAuth;
use Illuminate\Support\Facades\Auth;

/**
 * Class LoginController
 * @property JWTAuth JWTAuth
 * @package App\Http\Controllers\Auth
 */
class LoginController extends Controller
{
  /**
   * LoginController constructor.
   * @param JWTAuth $JWTAuth
   */
  public function __construct(JWTAuth $JWTAuth)
  {
    /** @var JWTAuth $JWTAuth */
    $this->JWTAuth = $JWTAuth;
  }

  /**
   * Log the user in
   *
   * @param LoginRequest $request
   * @return \Illuminate\Http\JsonResponse
   */
  public function login(LoginRequest $request)
  {
    $credentials = $request->only(['email', 'password']);
    if (!Auth::attempt($credentials)) {
      throw new InvalidCredentials('Invalid email or password provided.');
    }
    $token = $this->JWTAuth->fromUser(Auth::user());

    return response()
        ->json([
            'status' => 'ok',
            'token' => $token,
            'expires_in' => $this->JWTAuth->factory()->getTTL() * 60
        ]);
  }
}

NB:
Dumping Auth::user() returns a perfectly fine User instance.

[redolivedev]

Try running php artisan jwt:secret

[bigzoo]

Worked like a charm. Thanks @redolivedev I recently switched computers so I didn't have the key.

[i1990jain]

I am still having the same problem on laravel v5.6.* . running artisan jwt:secret did not help, I have followed the same instructions as in the page specified above

[kieranbarlow]

Same here @i1990jain any joy sorting?

Just sorted - run

php artisan cache:clear
php artisan config:clear

[ricardoperovano]

@redolivedev 's answer worked!

[chris123987]

我也遇到这样的问题，重新生成秘钥也没有用

[yoyTeam]

Same here @i1990jain any joy sorting?

Just sorted - run

php artisan cache:clear
php artisan config:clear

Work perfectly!! :D Thanks so much!