curl --request GET \
  --url https://api.getmembrane.com/customers \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "<string>",
      "name": "<string>",
      "internalId": "<string>",
      "meta": {},
      "fields": {},
      "credentials": {},
      "lastActiveAt": "<string>",
      "isTest": true,
      "isBillable": true,
      "isActive": true,
      "aiCreditsRolling30DayLimit": 1,
      "createdAt": "<string>",
      "archivedAt": "<string>"
    }
  ],
  "cursor": "<string>"
}