To verify the email address for a user call user. sendEmailVerification() . If you want to check whether an email address is already in use before registering the user, the Firebase Admin SDK has a method to look up a user by their email address: admin. auth() .
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EDIT: To check if user is ‘made-up’ or ‘real’, just send an email verification by calling FirebaseAuth. instance. currentUser. sendEmailVerification() and ask user to click the link sent in their email , if user is able to perform this action then email exists otherwise it’s ‘made-up’.
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Follow the steps to Firebase email and password authentication in the Flutter application.
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In the following steps, you will be able to build app a get current user.
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