This happens when you have not set yourself as an admin. To do so follow the below steps
1. Log into your game panel
2. Navigate to your Rust server > configuration files > Users.cfg
3. Enter the following within the Users.cfg (replace the < > with your details)
ownerid <Your Steam64ID> <Your Name>
e.g. ownerid 1234567891012 Pingperfect
4. save the file
5. reboot the server
Addendum: If you have changed the "Identity" field in the command line you will need to create the Users.cfg under Server/"Identity"
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