curl --request POST \
  --url https://api.timbal.ai/orgs/{org_id}/identity-providers/{provider_id}/group-mappings \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "external_group": "<string>",
  "role_id": 123
}
'

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