Finds an existing profile

Example response

{
  "profile": {
    "city": "Groningen",
    "province": "Groningen",
    "street": "Westerhaven",
    "housenumber": "4a",
    "zipcode": "9718AV",
    "country_code": "NL",
    "email": "john_doe@example.com",
    "first_name": "John",
    "middle_name": "Doe",
    "last_name": "Junior",
    "gender": "undefined",
    "active": true,
    "subscribed_to_newsletter": true,
    "tags": [
      "test",
      "test_profile",
      "fake"
    ],
    "telephone": "0501234567"
  }
}