How to change email in firebase auth?

Question

I am trying to change/update a user\'s email address using :

firebase.auth().changeEmail({oldEmail, newEmail, password}, cb)

But I am getti

Answer 1

updateEmail needs to happen right after sign in due to email being a security sensitive info
Example for Kotlin

 // need to sign user in immediately before updating the email 
        auth.signInWithEmailAndPassword("currentEmail","currentPassword")
        .addOnCompleteListener(this) { task ->
                if (task.isSuccessful) {
                    // Sign in success now update email                
                    auth.currentUser!!.updateEmail(newEmail)
                        .addOnCompleteListener{ task ->
                        if (task.isSuccessful) {
               // email update completed
           }else{
               // email update failed
                    }
       }
       } else {
                    // sign in failed
                }
            }