title: Firebase authenticate using email/password option doesn't show on assistant
body: <p>can't see the username/password authentication option in android studio's firebase assistant
  <a href="https://i.stack.imgur.com/NelmV.png" rel="nofollow noreferrer">Expected Screenshot</a></p>
  <p>but rather I see this <a href="https://i.stack.imgur.com/AY7ve.png" rel="nofollow noreferrer">other authentication options</a></p>
  <p>How can I fix this as I need to use email/pass authentication option.
  Thank you.</p>