title: How to check if an email address is already in use in Firebase on iOS?
body: <p>I'm using the Firebase Authentication for my iOS App. Now I want to check that the entered email address is available or not. I have found that I have to use <code>createUserWithEmailAndPassword</code> for this. But the issue is I don't want to pass Password. I only want to check using Email. How can I do this?</p>