Return an array where each entry is an object with this form:

{ source: "fitbit", name: "Fitbit", usernames: ["beau", "madprime"] }

GET /api/public-data/members-by-source/?source=direct-sharing-354
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Content-Type: application/json
Expires: Tue, 09 Aug 2022 10:39:30 GMT
Vary: Accept

{
    "count": 51,
    "next": null,
    "previous": null,
    "results": [
        {
            "source": "direct-sharing-354",
            "name": "File Uploader",
            "usernames": [
                "madprime",
                "jasonbobe",
                "rory_rocket",
                "sprague",
                "gedankenstuecke",
                "ramonimo",
                "benc",
                "agoramachina",
                "orhear",
                "stephenbrad",
                "Agaricus",
                "miqrom",
                "saw2112",
                "kaylea",
                "Crewest",
                "zergs",
                "Leo",
                "c3n47ur",
                "Zuckerfisch",
                "kevinlhoste",
                "kateimatson",
                "npkk75",
                "vytenisd",
                "pmartin1760",
                "jorsh",
                "Nzo",
                "ya_russkii",
                "KunLee",
                "disclaimer",
                "D1RKS1DE",
                "Traitwelltest",
                "Lazylizzard",
                "glebbabii",
                "HASANICHAVEZ53",
                "zinke",
                "LoquaciousLo",
                "jessie0o0",
                "Sergest",
                "JJ",
                "Whoisdsmith",
                "Orlando",
                "trilobutt",
                "zach",
                "ownevtof",
                "Meah",
                "bingsport",
                "htwitchell",
                "kirbyhaines",
                "jpalermo23",
                "Juska",
                "amlz",
                "jswetzen",
                "josueresende",
                "hughpearse",
                "Mclar385"
            ]
        }
    ]
}