i load the plugin to my server and i make some changes but i dont know the way how i give permmision to the player to unlock the kit that i make for reward? this is my file:

    "Command": "verify",
    "Discord bot key (Look at documentation for how to get this)": "*************************************************",
    "Verification Role (role given when verified)": "enter_role_here",
    "Commands to execute when player is verified (use {0} for the player's steamid)": [
    "oxide.usergroup {0} add Verify"
  ],
  "Amount of characters in the code": 6,
  "Erase all verification data on wipe (new map save)?": false,
  "Characters used in the verification code": "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz"
}​

ty for any help

Hey man, 

I was wanting to do this as well and I finally figured it out. You have:

"oxide.usergroup {0} add Verify"​

When it should read:
"oxide.usergroup add {0} Verify"

{0} being the player SteamID (which is default, you don't need to change this) and "Verify" being the permission you're wanting to grant.

so mine reads: "oxide.usergroup add {0} discord" -> granting them the discord permission and allowing them to use the kit.

Goodluck!