title: How do I determine which Devise/Warden strategy was used to authenticate/log in the user?
body: <p>Let's say I have two default strategies with Warden, <code>:database_authenticatable</code> and <code>:jwt</code>.</p>
  
  <p>How do I determine (inside of a controller) which strategy was used to log in the <code>current_user</code>?</p>