I can change the power levels using the server GUI as that is how I set my power level so that's, not an issue.
Can you explain how to change their passwords using my main GM5 level account and also how I would log in as them?
Secondly, is there something I should do to protect my main GM5 account? I mean like set it up as a proper account. All I have done is set my name on the game launcher, join the server then exit. Stop the server and give my name GM5 status. If I was to reinstall windows how would I keep access to this account and whats to stop someone else naming their person the same as mine and getting GM5 access? Is it done via steam64 ID?