curl -X DELETE -sSu "${username}:${password}" 'https://console.redhat.com/api/rbac/v1/groups/1c9b9b6b-9eef-4dd7-8fbf-7f333c6a7019/principals/?usernames=&service-accounts=jaudet' | jq

{
  "errors": [
    {
      "detail": "Service account(s) {'jaudet'} not found in the group 'Remediations FiFi'",
      "status": 404,
      "source": "groups"
    }
  ]
}