Register page in Android Studio using Firebase Databse

#Register page in android Studio
#Connect your project to firebase database
#Here typed add data in store in your firebase storage as node

public class RegisterActivity extends AppCompatActivity {

    private Button CreateAccountButton;
    private EditText InputName,InputPhoneNumber, InputPassword;
    private ProgressDialog loadingBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        CreateAccountButton = (Button) findViewById(R.id.register_btn);
        InputName = (EditText) findViewById(R.id.register_username_input);
        InputPassword = (EditText) findViewById(R.id.register_password_input);
        InputPhoneNumber = (EditText) findViewById(R.id.register_phone_number_input);
        loadingBar = new ProgressDialog(this);




        CreateAccountButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                CreateAccount();
            }
        });

    }

    private void CreateAccount()
    {
        String name = InputName.getText().toString();
        String phone = InputPhoneNumber.getText().toString();
        String password = InputPassword.getText().toString();

        if (TextUtils.isEmpty(name))
        {
            Toast.makeText(this, "Please write your name...", Toast.LENGTH_SHORT).show();
        }
        else if (TextUtils.isEmpty(phone))
        {
            Toast.makeText(this, "Please write your phone number...", Toast.LENGTH_SHORT).show();
        }
        else if (TextUtils.isEmpty(password))
        {
            Toast.makeText(this, "Please write your password...", Toast.LENGTH_SHORT).show();
        }
        else        {
            loadingBar.setTitle("Create Account");
            loadingBar.setMessage("Please wait, while we are checking the credentials.");
            loadingBar.setCanceledOnTouchOutside(false);
            loadingBar.show();

            ValidatephoneNumber(name, phone, password);
        }
    }

    private void ValidatephoneNumber(final String name, final String phone, final String password)
    {

        final DatabaseReference RootRef;
        RootRef = FirebaseDatabase.getInstance().getReference();


        RootRef.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                if (!(dataSnapshot.child("Users").child(phone).exists()))
                {
                    HashMap<String, Object> userdataMap = new HashMap<>();
                    userdataMap.put("phone", phone);
                    userdataMap.put("password", password);
                    userdataMap.put("name", name);

                    RootRef.child("Users").child(phone).updateChildren(userdataMap)
                            .addOnCompleteListener(new OnCompleteListener<Void>() {
                                @Override
                                public void onComplete(@NonNull Task<Void> task)
                                {
                                    if (task.isSuccessful())
                                    {
                                        Toast.makeText(RegisterActivity.this, "Congratulations, your account has been created.", Toast.LENGTH_SHORT).show();
                                        loadingBar.dismiss();

                                        Intent intent = new Intent(RegisterActivity.this, LoginActivity.class);
                                        startActivity(intent);
                                    }
                                    else                                    {
                                        loadingBar.dismiss();
                                        Toast.makeText(RegisterActivity.this, "Network Error: Please try again after some time...", Toast.LENGTH_SHORT).show();
                                    }

                                }
                            });

                }
                else {
                    Toast.makeText(RegisterActivity.this, "This " + phone + " already exists.", Toast.LENGTH_SHORT).show();
                    loadingBar.dismiss();
                    Toast.makeText(RegisterActivity.this, "Please try again using another phone number.", Toast.LENGTH_SHORT).show();

                   Intent intent = new Intent(RegisterActivity.this, MainActivity.class);
                    startActivity(intent);

                }

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

    }
}

#User Model Class

public class Users
{
    private String name, phone, password, image, address;

    public Users()
    {

    }

    public Users(String name, String phone, String password, String image, String address)
    {
        this.name = name;
        this.phone = phone;
        this.password = password;
        this.image = image;
        this.address = address;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}