public function getPersonalToken($username, $password)
    {
        $response = $this->client->request('POST', $this->authorization_url(),
            [
                "auth" => [ $username, $password],
                "json" => $this->authorizationsRequestJson()
            ]
        );
        $response = json_decode($response->getBody());
        $this->tokenName = $response->app->name;
        return $response->token;
    }