Firebase rule for my app permisison denied

Good morning,

I would like to secure access to my realtime firebase for only one person after connecting.
I set as a rule condition if auth == “Admin UID” for read and write.
But I have an access problem despite having the correct password and email.
The person must have access to the entire database.
I think I have a problem transferring rights between firebase authentication and firebase realtime database. However I use a tokenID.

Thank you for your help because I don’t want to use this rule:
“rules”: {
“users”: {
“$uid”: {
“.write”: “$uid === auth.uid”
At least not with a project bucket $uid

Fred

you could try something like this

Authenticated users can read and only those whose ID is within the AdmUsers node will be able to write

Hi,
My database llike this :

here is my database:

I would like a specific user to be able to read and write in “Nom de la feuille”, “01listelot” and “02listemission”.
Others will only be able to read the data.
I have the user’s uid but how can I authorize it in the firebase rules.

Good morning,
Thank you for your answer
but I don’t have a useradmin tag.
I created the useradmin and put the person’s UID then made the rules.
But when I want to modify or create data, it does nothing.

Fred