curl --request GET \
  --url https://api.timbal.ai/orgs/{org_id}/identity-providers/{provider_id}/group-mappings \
  --header 'Authorization: Bearer <token>'

{
  "group_role_mappings": [
    {
      "created_at": 123,
      "external_group": "<string>",
      "id": "<string>",
      "provider_id": "<string>",
      "role_id": "<string>",
      "updated_at": 123
    }
  ]
}