title: Getting auth token from keystone in horizon
body: <p>I want to get the auth token from keystone using horizon and then wants to pass that auth token to my backed code.</p>
  
  <p>i don't know how to get this, please help me out.</p>
  
  <p>I read many articles and blogs blogs but i am not able to find the answer. Please just point me into the right direction.</p>