Exchange a user access token for a tenant API key (first call seeds the tenant's signing key + demo schemas).

Example response

{
  "api_key": "<redacted>",
  "email": "docs-capture-6clew6@diditcapture.dev",
  "environment": "sandbox",
  "role": "owner",
  "seeded": true,
  "tenant": {
    "name": "docs-capture-6clew6",
    "slug": "docs-capture-6clew6"
  }
}