public function associateRefreshToken($accessTokenId, $refreshToken, $expireTime, $clientId)
    {
        DB::table('oauth_session_refresh_tokens')->insert(array(
            'session_access_token_id' => $accessTokenId,
            'refresh_token'           => $refreshToken,
            'refresh_token_expires'   => $expireTime,
            'client_id'               => $clientId,
            'created_at' => Carbon::now(),
            'updated_at' => Carbon::now()
        ));
    }