FireBase，DatabaseError：权限被拒绝（再次）

Question

I am trying for a while to connect to FireBase and I`m always getting to

DatabaseError: Permission denied.

I know that this is a question that many asked and might be a duplicate, but as you can see I did almost everything.

My Java code:

DatabaseReference myRef = FirebaseDatabase.getInstance().getReference("Users");
enter code here`myRef.setValue("Hello, World!");

• I Did all the stpes of Tools>FireBase>RealTime DB

• I did all the steps of Add Firebase to your Android app (Register app -> "DownLoad config file" and put it in the app folder. -> "Add Firebase SDK" (just higher versions) -> Manually synced Gradle -> Than "Run your app to verify installation" , but here it was stuck and was just waiting also after I started my app

• I tried via almost all StackOverFlow to give full access to every one:

{
  /* Visit https://firebase.google.com/docs/database/security to learn more about security rules. */
  "rules": {
    ".read": true,
    ".write": true
  }
}

Answer 1

you should replace this line of code. hope you get the point.

DatabaseReference myRef = FirebaseDatabase.getInstance().getReference("Users");
myRef.setValue("Hello, World!");