I am just wonder if there is a way to grant a plugin for everyone in the server

Yes, it is documented in the Docs.

https://umod.org/documentation/plugins/permissions#groups

What i am saying is if somone new joins i dont want to grant them the plugin is there some way i can make a group so when people join they already have the perks?

You'd grant the default group the permission.

Thanks for the help!