Is it feasible to obtain the userId or userInfo from the Firebase authentication API without requiring a login?

Is it feasible to retrieve the user id from Firebase authentication API "email/password method" without logging in?

Imagine a function that takes an email as a parameter and returns the firebase userId.

getId(email){
 //this is just an example 
 return this.firebase.auth.getId(email); // this method is not actually a Firebase method, I wrote it for clarification
}

https://i.stack.imgur.com/G7MDf.png I am looking to obtain the User UID shown in the image above without logging in (without the current user).

Thank you.

angulartypescriptauthenticationfirebase-authentication

Answer №1

If you need to retrieve user data from Firebase, the Firebase Admin SDK is your best bet. Check out the information in the official documentation.

admin.auth().getUserByEmail(email)
  .then(function(userRecord) {
    // Take a look at the data in userRecord
    console.log("User data successfully retrieved:", userRecord.toJSON());
  })
  .catch(function(error) {
    console.log("Error retrieving user data:", error);
  });

You may also find this helpful: Firebase Authentication Service - lookup uid from email without login

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