List organization users

curl --request GET \
  --url https://app.useitem.io/api/meta/users \
  --header 'x-api-key: <api-key>'

{
  "data": [
    {
      "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
      "full_name": "Alex Johnson",
      "access_level": "admin"
    },
    {
      "id": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
      "full_name": "Sarah Chen",
      "access_level": "member"
    }
  ]
}