How to get userID by user Email Firebase android?

Question

Given a email address, is it possbile to get userID of a person? For example,

If I have a variable email that has email of the person. Can I get their ID by doing so

Answer 1

The easy way to solve this is to create another model(table), that holds the users email address and id. This way you can retrieve the id having the email. There are solutions that use java-script, but they have complex running time.