{
  "companyName": "Acme Travel",
  "email": "ops@acme.com",
  "password": "supersecret123"
}

{
  "token": "<jwt>",
  "tenant": { "id": "...", "name": "Acme Travel" },
  "apiKey": "tb_..."
}

{ "email": "ops@acme.com", "password": "supersecret123" }

{ "token": "<jwt>", "tenant": { "id": "...", "name": "Acme Travel" } }