What is Auth0 used for?

Auth0 is a flexible, drop-in solution to add authentication and authorization services to your applications . Your team and organization can avoid the cost, time, and risk that come with building your own solution to authenticate and authorize users.

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What is FirebaseAuth?

public abstract class FirebaseAuth extends Object . The entry point of the Firebase Authentication SDK . First, obtain an instance of this class by calling getInstance() . Then, sign up or sign in a user with one of the following methods: createUserWithEmailAndPassword(String, String)

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