HTTP 400
Invalid Unsubscribe Token
The unsubscribe token is missing, expired, or has been tampered with.
Example response
{
"type": "https://email.squibble.ch/docs/errors/unsubscribe/invalid-token/",
"title": "Invalid Unsubscribe Token",
"status": 400,
"detail": "...",
"instance": "/api/v1/..."
}