curl --request POST \
  --url https://api.gleap.io/v3/sessions/unsubscribe \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'project: <project>' \
  --data '
{
  "sessions": [
    {
      "userId": "<string>",
      "email": "<string>"
    }
  ],
  "reason": "<string>"
}
'

{
  "success": true
}