List invites for a service

Example response

[
  {
    "_links": [
      {
        "href": "https://an.example.link",
        "method": "GET",
        "rel": "self"
      }
    ],
    "email": "example@example.gov.uk",
    "is_invite_to_join_service": true,
    "otp_key": "ABC123",
    "role": "view-only",
    "telephone_number": "+440787654534"
  }
]