Help request

Problem
My problem is that only OP players can use the backpack. The problem is that I dont want to op everyone on the server. So is there a way to activate the plugin for every player (op and not op) ?

What I have tried
I tried to use the plugin PermissionEX but its a real pain to use it with all the plugins i already have. So i prefer not to. Is there another solution ? If so. If i really need to use permissionEX. What should I write in the permissionEX file to let my server know that non-op players can use the backpack too.

Thank you !

You can use this workaround.

I tried this and NON-OP players can use the backpack, correct, BUT when they die, they loose all the ressources inside it. So is there a code to keep the ressources/items inside after their death ? Like it works for OP players (When I die I still keep the things inside, its a thing Id like to keep for everyone)

Its ok ! I found that I could add this line : "backpack.keepOnDeath: true" and it works now ! Thank you for your support.