curl --request POST \
  --url https://{tenant}.stamp.eu/rest/register \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "company_name": "<string>",
  "subdomain": "<string>",
  "email": "jsmith@example.com",
  "admin_code": "<string>",
  "admin_password": "<string>",
  "admin_password_confirmation": "<string>",
  "admin_name": "<string>",
  "admin_surname": "<string>",
  "timezone": "Europe/Berlin"
}
'

{
  "message": "<string>",
  "tenant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "subdomain": "<string>"
}