public function authToken (Request $request) {
    $username = $request->input('username');
    $password = $request->input('password');

    if (Auth::attempt(['email' => $username, 'password' => $password])) {
        $http = new \GuzzleHttp\Client();
        $response = $http->post('http://localhost:8000/oauth/token', [
            'form_params' => [
                'grant_type' => 'password',
                'client_id' => '2',
                'client_secret' => 'pc4cjW6KEwufFAf31f1HRFFTtL2dOHPmTgDLKR',
                'username' => $username,
                'password' => $password,
                'scope' => '',
            ],
        ]);
        return json_decode((string) $response->getBody(), true);
    } else {
        return 'Email or Password is incorrect';
    }
}