How can i add guest user to Hipchat Guest Room by Fullname

[Parth Kundariya]

I have created custom web app as per my requirement.

I wanted to add guest user using Full Name to Hipchat Guest Room.

When i am trying to add user i am getting response as below:

[error] => stdClass Object
(
     [code] => 400
     [message] => Unable to create user. You must purchase more licenses in order to      add additional users
     [type] => Bad Request
)

Here is my code:

public static function invite_user_to_group($email, $name){
     global $token;

     // Invite User Star
     $data = array(
          "email" => $email,
          "name" => $name
     );
     $url_send = HOMEURL."/v2/invite/user?auth_token=".TOKEN;
     $str_data = json_encode($data);
     $res = Livechat::sendPostData($url_send, $str_data);

     if($res != '')
          return $res;
     else
          return false;

}

Please help me how can i do that. Thank in advanced!!!

[edwin]

You are out of user licenses.

https://www.atlassian.com/software/hipchat/pricing