title: Is there a way to check credentials with Firebase?
body: <p>I'm using Firebase Auth (web API) and am looking for a way to check the validity of a user's email / password combination for account removal.</p>
  
  <p>Ideally a call like <code>Firebase.isValidCredentials(email, password)</code></p>
  
  <p>Problem context: 
  In my app, when a user requests to remove his/her account, I want to prompt to re-enter their password as confirmation. If correct, the account should be removed along with all other associated data (living under different Firebase nodes).</p>
  
  <p>While the credentials check is done by <code>Firebase.removeUser()</code>, that also removes the auth:ed account with it, which breaks my ability to remove user data (as I've set Firebase Security to require active auth for manipulating user data nodes).</p>
  
  <p>Appreciate guidance here, and if there's a Firebase recipe for removing user accounts along with user data.</p>