"Readable if" for specific user group

We want admin group to see everything, but we want other users to only see information about themselves. I used the user() function and provide that other users only see information about themselves. However, I can't provide both of them. For example, I have an admin account and I write this function code;

if not userHasRole("admin") then
'Operation Specialist' = user()
end


However, admin group users can't read anything. Admin users should read everything. Please, support us.