Получение 'Не удалось декодировать токен: ошибка при декодировании в JSON: неправильно сформированные символы UTF-8, возможно, неправильно закодированы' ошибка в аутентификации laravel

Question

Хи, я новичок в Laravel. пытаясь сделать laravel auth rest api с помощью jwt и используя Postman для тестирования.
Свернуть это руководство на Средний.
Функция входа и регистрации работает нормально. Но когда я пытаюсь выйти с токеном, который я получил после успешного входа в систему.
Это дает мне несанкционированную ошибку. И если я использую принять JSON только в заголовках. Это дает мне ниже ошибки:

"Не удалось декодировать токен: ошибка при декодировании в JSON: неправильно сформированные символы UTF-8, возможно, неправильно закодированы"

Я искал эту проблему в течение дня. Я должен представить этот API моей команде сегодня вечером.

Ниже приведен пример кода моего AuthController.

namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\User;
use JWTAuth;
use Tymon\JWTAuth\Exceptions\JWTException;
use Validator, DB, Hash, Mail;
use Illuminate\Support\Facades\Password;
use Illuminate\Mail\Message;
class AuthController extends Controller
{
/**
 * API Register
 *
 * @param Request $request
 * @return \Illuminate\Http\JsonResponse
 */
public function register(Request $request)
{
    $credentials = $request->only('name', 'email', 'password');

    $rules = [
        'name' => 'required|max:255',
        'email' => 'required|email|max:255|unique:users'
    ];
    $validator = Validator::make($credentials, $rules);
    if($validator->fails()) {
        return response()->json(['success'=> false, 'error'=> $validator->messages()]);
    }
    $name = $request->name;
    $email = $request->email;
    $password = $request->password;

    $user = User::create(['name' => $name, 'email' => $email, 'password' => Hash::make($password)]);
    $verification_code = str_random(30); //Generate verification code
    DB::table('user_verifications')->insert(['user_id'=>$user->id,'token'=>$verification_code]);
    $subject = "Please verify your email address.";

    Mail::send('email.verify', ['name' => $name, 'verification_code' => $verification_code],
        function($mail) use ($email, $name, $subject){
            $mail->from(getenv('FROM_EMAIL_ADDRESS'), "ehsanellahi61@gmail.com");
            $mail->to($email, $name);
            $mail->subject($subject);
        });
    return response()->json(['success'=> true, 'message'=> 'Thanks for signing up! Please check your email to complete your registration.']);
}

/**
 * API Verify User
 *
 * @param Request $request
 * @return \Illuminate\Http\JsonResponse
 */
public function verifyUser($verification_code)
{
    $check = DB::table('user_verifications')->where('token',$verification_code)->first();
    if(!is_null($check)){
        $user = User::find($check->user_id);
        if($user->is_verified == 1){
            return response()->json([
                'success'=> true,
                'message'=> 'Account already verified..'
            ]);
        }
        $user->update(['is_verified' => 1]);
        DB::table('user_verifications')->where('token',$verification_code)->delete();
        return response()->json([
            'success'=> true,
            'message'=> 'You have successfully verified your email address.'
        ]);
    }
    return response()->json(['success'=> false, 'error'=> "Verification code is invalid."]);
}

/**
 * API Login, on success return JWT Auth token
 *
 * @param Request $request
 * @return \Illuminate\Http\JsonResponse
 */
public function login(Request $request)
{
    $credentials = $request->only('email', 'password');

    $rules = [
        'email' => 'required|email',
        'password' => 'required',
    ];
    $validator = Validator::make($credentials, $rules);
    if($validator->fails()) {
        return response()->json(['success'=> false, 'error'=> $validator->messages()], 401);
    }

    $credentials['is_verified'] = 1;

    try {
        // attempt to verify the credentials and create a token for the user
        if (! $token = JWTAuth::attempt($credentials)) {
            return response()->json(['success' => false, 'error' => 'We cant find an account with this credentials. Please make sure you entered the right information and you have verified your email address.'], 404);
        }
    } catch (JWTException $e) {
        // something went wrong whilst attempting to encode the token
        return response()->json(['success' => false, 'error' => 'Failed to login, please try again.'], 500);
    }
    // all good so return the token
    return response()->json(['success' => true, 'data'=> [ 'token' => $token ]], 200);
}

/**
 * Log out
 * Invalidate the token, so user cannot use it anymore
 * They have to relogin to get a new token
 *
 * @param Request $request
 */
public function logout(Request $request) {
    $this->validate($request, ['token' => 'required']);

    try {
        JWTAuth::invalidate($request->input('token'));
        return response()->json(['success' => true, 'message'=> "You have successfully logged out."]);
    } catch (JWTException $e) {
        // something went wrong whilst attempting to encode the token
        return response()->json(['success' => false, 'error' => 'Failed to logout, please try again.'], 500);
    }
}

 /**
 * User
 * User information will be given
 *
 * @param Request $request
 */
public function user(Request $request) {
    $this->validate($request, ['token' => 'required']);

    try {
        JWTAuth::invalidate($request->input('token'));
        return response()->json(['success' => true, 'message'=> "You have successfully logged out."]);
    } catch (JWTException $e) {
        // something went wrong whilst attempting to encode the token
        return response()->json(['success' => false, 'error' => 'Failed to logout, please try again.'], 500);
    }
}

/**
 * API Recover Password
 *
 * @param Request $request
 * @return \Illuminate\Http\JsonResponse
 */
public function recover(Request $request)
{
    $user = User::where('email', $request->email)->first();
    if (!$user) {
        $error_message = "Your email address was not found.";
        return response()->json(['success' => false, 'error' => ['email'=> $error_message]], 401);
    }
    try {
        Password::sendResetLink($request->only('email'), function (Message $message) {
            $message->subject('Your Password Reset Link');
        });
    } catch (\Exception $e) {
        //Return with error
        $error_message = $e->getMessage();
        return response()->json(['success' => false, 'error' => $error_message], 401);
    }
    return response()->json([
        'success' => true, 'data'=> ['message'=> 'A reset email has been sent! Please check your email.']
    ]);
}

}