title: How to add keystore to react native app to use firebase auth?
body: <p>I am developing react native app I am trying to use firebase authentication with otp code from sms and it is work with ios, but not with android. In android I have such error
  <a href="https://i.stack.imgur.com/ZjUlg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZjUlg.png" alt="error from firebase"></a>
  I try to solve this issue like it is described <a href="https://rnfirebase.io/" rel="nofollow noreferrer">here</a>
  I ran <code>./gradlew signingReport</code> from android folder and found that I have error <code>Error: Missing keystore</code> 
  <a href="https://i.stack.imgur.com/QkA9a.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QkA9a.png" alt="screen from terminal"></a>
  Does anyone know how to solve this? Thanks!</p>