title: how to update user phone number in firebase.auth (js, ts)
body: <p>How can i update user phone number which it use for auth in firebase.auth??</p>
  
  <p>Firebase give as method:</p>
  
  <pre><code>updatePhoneNumber(phoneCredential)
  </code></pre>
  
  <p>But we need give  <strong>phoneCredential</strong>. 
  This credential takes object:</p>
  
  <pre><code>  interface AuthCredential {
      providerId: string;
      signInMethod: string;
    }
  </code></pre>
  
  <p>What must be in this <strong>phoneCredential</strong>, i try to send </p>
  
  <pre><code>providerId: 'phone';
  signInMethod: 'phone';
  </code></pre>
  
  <p>and this is not work ;(</p>