Validate an invitation token

Returns whether the invitation is valid and, if so, basic user metadata for the onboarding screen.

GET /api/invitation/validate — internal browser-facing endpoint, not part of the external API.

Parameters

Name	In	Required	Description
`token`	query	yes	Invitation token from the emailed link.

Success:

{
  "valid": true,
  "email": "admin@example.com",
  "name": "Jane Admin",
  "userType": "admin"
}

Failure:

{
  "valid": false,
  "error": "expired"
}

Error values: missing_token, not_found, expired, consumed.