soer he means creating groups and adding permissions to them using commands.
I won’t add it, because I don’t think it’s better than doing it through HeidiSQL for example. I will record a video tutorial showing what’s the best way to do it and what each configuration option means tomorrow.
Liebesleid regarding your <ServerGroup>PVP</ServerGroup>
question. You can use server group to scope the specific permissions/groups/members to specific servers. For example if you have set ServerGroup in PermissionGroupMembers table to PVP in some row, then that player will only have the rank you gave him on the servers with PVP server group. So basically when plugin queries the database for the list of groups, permissions and members it gets all of them that include the same Server Group as you have specified in the configuration of that server and all that have server group column value equal to NULL
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I hope I made it clear, but if not I will make a video to show it tomorrow 🙂