3강 firebase 쓰기가 동작하질않아요

3강 첫번째 유저 데이터베이스 쓰기

강의보고 firebase 회원가입해보고있는데

email, pw 는 등록이 되나

realtime database에는 데이터가 들어가지 않습니다

package com.example.test_1.auth

import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity
import com.example.test_1.MainActivity
import com.example.test_1.R
import com.example.test_1.utils.FirebaseRef
import com.google.android.material.textfield.TextInputEditText
import com.google.firebase.FirebaseApp
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.ktx.auth
import com.google.firebase.database.ktx.database
import com.google.firebase.ktx.Firebase

class JoinActivity: AppCompatActivity()  {
    private val TAG = "JoinActivity"
    private lateinit var auth : FirebaseAuth //추후 초기화해서 사용할 변수이다

    private var nickname = ""
    private var gender = ""
    private var city = ""
    private var age = ""
    private var uid = ""


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_join)
        //FirebaseApp.initializeApp(this);
        auth = Firebase.auth

        var joinButton = findViewById<Button>(R.id.joinBtn)
        joinButton.setOnClickListener {
            var email = findViewById<TextInputEditText>(R.id.join_email)
            var pwd = findViewById<TextInputEditText>(R.id.join_pwdArea)
            gender = findViewById<TextInputEditText>(R.id.join_gender).text.toString()
            city = findViewById<TextInputEditText>(R.id.join_area).text.toString()
            age = findViewById<TextInputEditText>(R.id.join_age).text.toString()
            nickname = findViewById<TextInputEditText>(R.id.join_nickname).text.toString()

//            Log.d(TAG, email.text.toString())
//            Log.d(TAG, pwd.text.toString())


            auth.createUserWithEmailAndPassword(email.text.toString(),pwd.text.toString())
                .addOnCompleteListener(this) { task ->
                    if (task.isSuccessful) {
                        // Sign in success, update UI with the signed-in user's information
                        Log.d(TAG, "createUserWithEmail:success")
                        var user = auth.currentUser
                        uid = user?.uid.toString() // user가 null 이 아니면 toString

                        val database = Firebase.database
                        val myRef = database.getReference("message")
                        myRef.setValue("Hello, World!")
                        Log.d(TAG, "push database :success")
                        myRef.setValue("11111111111")
                        myRef.setValue("2222222222")
                        //firebase 접속관련 util로 패키징
                        //FirebaseRef.userinfo.setValue("userinfo","hello")

//                        val udm = UserDataModel(uid,
//                        nickname,
//                        age,
//                        gender,
//                        city)
//                        FirebaseRef.userInfoRef.child(uid).setValue(udm)
                        //성공시 메인으로 이동
                   //     var intent = Intent(this, MainActivity::class.java)
                    //    startActivity(intent)

                    } else {
                        // If sign in fails, display a message to the user.
                        Log.w(TAG, "createUserWithEmail:failure", task.exception)
                    }
                }
        }
    }
}