Every user able to see another user's and a full device list

[SergeyRim]

Describe the bug
Every logged in user can see a full device's list and other users.

How to Reproduce the bug
Steps to reproduce the behavior:

1. Create a non-admin users (in different groups)
2. Login from any of these user into rustdesk or web UI
3. Each logged in user can see a full device's list and all other users from all groups

Expected behavior
Users from different groups should not see each other.
Regular users should not be able to see whole device's list