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-194
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Content-Type: application/json
Expires: Mon, 06 Dec 2021 01:31:12 GMT
Vary: Accept

{
    "count": 53,
    "next": null,
    "previous": null,
    "results": [
        {
            "source": "direct-sharing-194",
            "name": "UbiQomix Microbiome Exploration",
            "usernames": [
                "McTrimm",
                "rssfed23",
                "bizemama",
                "TJHolland",
                "NabilNazir",
                "E19463",
                "mkowalski",
                "Zii",
                "Elly98",
                "ataneojr1",
                "bitsy",
                "beau",
                "cascrogg",
                "Ckova",
                "marty83687",
                "that_irish_guy",
                "nharhen",
                "stiv",
                "vanessasunshine",
                "ChickaSha",
                "dnvrdavid",
                "genegenome",
                "Matt",
                "grantmeadors",
                "thenewlight",
                "Jashwanthpeddi",
                "salbers12",
                "vbcoach",
                "wolfgang8741",
                "Eroush",
                "mutneg",
                "Marc78400",
                "Leaventhall",
                "Blueberry1373",
                "jbearden",
                "pfinney40",
                "fhapgood",
                "hausa84",
                "stephenbrad",
                "Whynot",
                "PaulSmith",
                "sanderfeinberg",
                "Judy323",
                "cct",
                "freya",
                "Deni57",
                "SuperLuckyCat",
                "warriorguy",
                "afnium",
                "wdmulanaxjr1",
                "blackbearnh",
                "jsbrava",
                "janslu",
                "IonutMurariu",
                "ehoneycomb",
                "bradly22",
                "westr",
                "Cbbrink",
                "rizley",
                "usmcdv1963",
                "aldinasordi",
                "CraigClarke",
                "Servaya",
                "Explore360",
                "GorjanAnastasov",
                "mheffler",
                "pill",
                "lisag74",
                "Rebeccawells1974",
                "Tapatingo",
                "usijim",
                "bdaqueen",
                "Ksyndo",
                "acockbur",
                "back_ache",
                "Gikady",
                "treeserv",
                "MCzigler",
                "Bsuet09",
                "Elcharles89",
                "jrmckinnon",
                "simondc666",
                "Kiwifulla",
                "irock1106",
                "Hvegavergel",
                "Fortin",
                "kmundy",
                "Earytha",
                "leozacha",
                "jasonrj19",
                "jameslvick",
                "Chris_Durall",
                "davenation",
                "dougsweetser",
                "Hexaped",
                "gsdcomo",
                "husamia",
                "cotton",
                "bonbon",
                "taximeow",
                "Lovelee",
                "KJBW",
                "Misspadme",
                "emilystg",
                "emeadows317",
                "JackieHorne",
                "Dario",
                "annallull",
                "Sylph",
                "Hsimmon",
                "Sarmas",
                "jtadams41",
                "esimoneaux",
                "rellihja",
                "tonyfish",
                "hu8229AE",
                "LubnaDajani",
                "saw2112",
                "brianpardy",
                "MCBudd",
                "XZ2019",
                "rojoto",
                "gedankenstuecke",
                "phenylalanine",
                "heckno19",
                "hu1F73AB",
                "Pati3NtP10neer",
                "padams89",
                "Dan",
                "jcrben",
                "GemmaKateRooney",
                "mdulaney",
                "miqrom",
                "dreamicide",
                "Sruscoe88",
                "pmartin1760",
                "npkk75",
                "HASANICHAVEZ53",
                "YeeYee",
                "Itzaroz",
                "disclaimer",
                "ousspuddi",
                "KaleyWhite",
                "robbdi",
                "matfax",
                "okamoto727"
            ]
        }
    ]
}