List Invitations

curl --request GET \
  --url https://api.example.com/api/v1/invitations

{
  "invitations": [
    {
      "id": "<string>",
      "account_id": "<string>",
      "account_code": "<string>",
      "email": "<string>",
      "invited_by": "<string>",
      "expires_at": "2023-11-07T05:31:56Z",
      "created_at": "2023-11-07T05:31:56Z",
      "status": "pending",
      "token": "<string>",
      "accepted_at": "2023-11-07T05:31:56Z",
      "email_sent": false,
      "email_sent_at": "2023-11-07T05:31:56Z"
    }
  ],
  "total": 123
}