User registration fails with Firebase in Android-CodePudding

Can you help me understand why this class does not refrain the user? In practice, when I enter email, password, etc. then I click on registration gives me that the user has not been registered, how can I do?

    public void singUpUser(final String email , final String password, final String nickName, final String confermaPassword) {

        final ProgressDialog dialog = new ProgressDialog(mContext);
        dialog.setMessage("Stiamo registrando l'utente....");
        dialog.setCancelable(false);
        dialog.show();

        mAuth.signInWithEmailAndPassword(email,password)
                .addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information
                            Log.d(TAG, "crearUterWithEmail:Success");
                            dialog.dismiss();
                            Map<String,Object> creaUtente = new HashMap<>();
                            creaUtente.put("email", email);
                            creaUtente.put("password", password);
                            creaUtente.put("nickName", nickName);
                            creaUtente.put("confermaPassword", confermaPassword);
                            mDatabase.child("Utente").child(task.getResult().getUser().getUid()).updateChildren(creaUtente);

                            Intent intent = new Intent(mContext, activity_singIn.class);
                            mContext.startActivity(intent);
                        } else {
                            dialog.dismiss();
                            // If sign in fails, display a message to the user.
                            Log.w(TAG, "crearUterWithEmail:failure", task.getException());
                            Toast.makeText(mContext, "Authentication failed.",
                                    Toast.LENGTH_SHORT).show();

                        }
                    }
                });
    }
    }

CodePudding user response：

When you're getting the following error:

There is no user record corresponding to this identifier. The user may have been deleted.

Most likely means that you're trying to use the credentials of a user that doesn't exist in Firebase authentication anymore. A possible reason would be, that you deleted it.

To solve this, you have to create the user again, using createUserWithEmailAndPassword() and right after that try to sign in using signInWithEmailAndPassword().

CodePudding user response：

eccola:

public void singInUser(String email , String password) {

        ProgressDialog dialog = new ProgressDialog(mContext);
        dialog.setMessage("Accesso....");
        dialog.setCancelable(false);
        dialog.show();

        mAuth.signInWithEmailAndPassword(email,password)
                .addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information
                            Log.d(TAG, "signInWithEmailAndPassword:Esiste");
                            dialog.dismiss();
                            Intent intent = new Intent(mContext, activity_Home.class);
                            mContext.startActivity(intent);
                        } else {
                            dialog.dismiss();
                            // If sign in fails, display a message to the user.
                            Log.w(TAG, "signInWithEmailAndPassword:failure", task.getException());
                            Toast.makeText(mContext, "Authentication failed.",
                                    Toast.LENGTH_SHORT).show();

                        }
                    }
                });