Get all roles for sessions

curl --request GET \
  --url https://api.readmin.app/sessions/roles \
  --header 'loader-id: <api-key>'

{
  "success": true,
  "sessions": [
    {
      "id": "<string>",
      "name": "<string>",
      "maxUsers": 123,
      "minRank": 123,
      "claimOnce": true
    }
  ]
}