This is the updated version for 2023 (originally we made it between July and August 2022)
@tuankun-279, @KiwiLifeIsGood, @LeQuangKien, Nhi Bui (You can find them at GitHub, "@" means that they have their account)
java, firebase
20 Nov 2023: Fix The Uid User unable to retrieve: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference