title: KIK bot send message to user's friends after user permission
body: <p>I'm creating KIK bot.<br>
  My goal is to send messages to user's friend after this user permission.<br>
  But I haven't found anything that can help me. <br>
  During process I've found 'kid.sign' function, but I don't clearly understand how it works. <br>
  This is link to api: <a href="https://dev.kik.com/#/docs/kikjs" rel="nofollow">https://dev.kik.com/#/docs/kikjs</a></p>