Update Email 
The Update email method is used to change the email of a user existing in Firebase.
To make a request to update a user's email, follow these steps:
- Open the request panel and click on the +button to add a new request.
- Fill in an appropriate name for the request and select the Firebase app to be used for the request. Then, under the method, choose Update email.
- Under the Email menu, fill in the email (or use an input field or form field). 