Add permissions to players?

Is there any straightforward way of doing this? I'm trying to give players permissions when they join my server, but I don't see any way of doing this in the docs.

you referring to pureperms?

No, not PurePerms. I want to learn how to do it without PurePerms.

oh I've never attempted self permission system sorry

maybe glancing at the code might help
https://github.com/PurePlugins/PurePerms
Or maybe not

Goto github search pocketmine click pocketmine click ^Find File^ type permissions.php click the file look through the functions finished.
I also have posted something on the /Plugins/resurces forum

If you don't know ho to do it, don't reply, because that doesn't really help me at all..

Did you look in the file?
If you looked at it you would understand it!!