curl --request POST \
  --url http://localhost:8000/auth/register \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "<string>",
  "password": "<string>",
  "name": "<string>",
  "tenant_slug": "<string>",
  "tenant_name": "<string>"
}
'

{
  "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "email": "<string>",
  "tenant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "role": "<string>",
  "onboarding_ticket": "<string>"
}