每次新用户在firebase

Question

用户成功注册并在Firebase中显示。但是，每次用户注册时，应用程序都会崩溃，尽管它可以在Firebase中成功注册。有没有我错误配置的东西？

 reg.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(TextUtils.isEmpty(email.getText().toString())||TextUtils.isEmpty(password.getText().toString()))
                Toast.makeText(getApplicationContext(),"Please fill in all the detail",Toast.LENGTH_SHORT).show();
            else if(password.getError()!=null||email.getError()!=null)
                Toast.makeText(getApplicationContext(),"Please fill in the detail correctly",Toast.LENGTH_SHORT).show();
            else{
                signUp( );
            }


        }
    });

}

//Sign Up method
private void signUp() {
    String e=email.getText().toString().trim();
    String p=password.getText().toString().trim();
    mAuth.createUserWithEmailAndPassword(e,p).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
            Log.d("SIGNIN", "Sign up Successfully" + task.isSuccessful());
            if (!task.isSuccessful()) {
                Toast.makeText(RegisterActivity.this, "Signed up Failed", Toast.LENGTH_SHORT).show();
            }
            else{
                createNewAccount(task.getResult().getUser());


            }
        }
    });
}

我认为问题存在于此处

private void createNewAccount(FirebaseUser user) {
    String username = name.getText().toString().trim();
    int point=0;
    String date1="None";
    // Write new user
    writeNewUser(user.getUid(), username, user.getEmail(),point,date1);
    // Go to MainActivity
    startActivity(new Intent(RegisterActivity.this, RewardGainActivity.class));

}

private void writeNewUser(String userId, String Uname, String eMail, int pointss, String date11) {
        User user=new User(Uname,eMail,pointss,date11);
    mDatabase.child("users").child(userId).setValue(user);
}

public class User {
   public String uName2;
    public String eMail2;
    public int point2;
    public String Date2;

    public User() {
        // Default constructor required for calls to DataSnapshot.getValue(User.class)
    }
    public User(String uName2, String eMail2, int point2, String Date2) {
        this.uName2=uName2;
        this.eMail2=eMail2;
        this.point2=point2;
        this.Date2=Date2;
    }
}