public function associateAuthCode($sessionId, $authCode, $expireTime)
    {
        $id = DB::table('oauth_session_authcodes')->insertGetId(array(
            'session_id'        => $sessionId,
            'auth_code'         => $authCode,
            'auth_code_expires' => $expireTime,
            'created_at' => Carbon::now(),
            'updated_at' => Carbon::now()
        ));

        return $id;
    }