curl --request POST \
  --url http://localhost:3000/master/users \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "email": "[email protected]",
  "organization": "<string>",
  "tier": "free",
  "password": "<string>"
}
'

{
  "user": {
    "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "email": "[email protected]",
    "organization": "<string>",
    "tier": "free",
    "status": "active",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}