Help request

Problem

I'm new to setting up plugins? How do I make it so that all players can use the /backpack command? Currently only I can and all other players get "you do not have the permission to do that" message.

What I have tried

I looked through config.yml but I'm stumped. Thank you.

Players need at least the backpack.use permission in order to be able to use the plugin. You can add it with your permission plugin. If you don't have a permission plugin, you can use the permissions.yml file, like described here.

Thanks!

I really appreciate this answer. I do have one more question, can you give permissions in that permissions.yml individually?
For example it would be nice to have them earn a row at a time by doing things in events. So I guess I'm asking if there is a way I could change that permissions yml to reflect each user's permissions

I really appreciate this answer. I do have one more question, can you give permissions in that permissions.yml individually?
For example it would be nice to have them earn a row at a time by doing things in events. So I guess I'm asking if there is a way I could change that permissions yml to reflect each user's permissions

No, the permissions.yml trick only works if you want to set permissions for all players, none-op players or op players.
For anything more you will need a permission plugin like LuckPerms. Most permission plugins also allow you to define some kind of promotion ladders (tracks in LuckPerms) that would allow you to easily implement players gaining rows for doing events.

Thank you very much!!