Laravel additional/custom query for authenticating user

I am trying to add additional query conditional while authenticating a user.

I have the users table and it has the role column. I need to authenticate only specific users with the defined role.

Here is my controller method

public function login( UserAuthRequest $request ) {
    $credentials = $request->only( 'login', 'password' );
    if ( $token = $this->guard()->attempt( $credentials ) ) {
        return $this->respondWithToken( $token );
    }
    return response()->json( [ 'error' => 'Unauthorized' ], 401 );
}

auth.php section

'admin-users' => [
            'driver' => 'eloquent',
            'model'  => AdminUser::class,
        ],

The admin user has it's own table called admin_users with the foreign key to the users table.

As a result I get the following error

Column not found: 1054 Unknown column 'login' in 'where clause' (SQL: select * from `admin_users` where `login` = admin limit 1)"

I've tried to pass userEntity.login instead of simply login, however this didn't work.

How to solve this problem without creating custom providers?

Thx.

via Chebli Mohamed