title: signWithCustomMethod error [ Invalid assertion format. 3 dot separated segments required. ]
body: <pre><code>firebase.auth().signInwithCustomToken().then().catch()
  </code></pre>
  
  <p>It is separated by 3 dots. 
  what should I pass in the parameter of signInwithCustomToken() method?
  id or some token?
  P.S.createCustomToken() is deprecated so i am using the signInWithCustomMethod directly. Also i am still using the free version, i.e biling is not enabled in firebase console.</p>