We RECOMMENDED that you never allow access to your VPS Administrator account unless you 100% trust the admins or developers
For allowing access for developers or admins into your VPS would be best by adding them as users on the VPSOn your VPS, please go to Control Panel > User Accounts > User Accounts > Manage Another Accounts > Add A User AccountWindows Server 2019 Adding User On WindowsIf you still do want them to have access to the VPS but still need files to the server, please use a program like GitHub