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/?format=api&source=direct-sharing-118
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Content-Type: application/json
Expires: Mon, 28 Sep 2020 06:20:21 GMT
Vary: Accept

{
    "count": 50,
    "next": null,
    "previous": null,
    "results": [
        {
            "source": "direct-sharing-118",
            "name": "Nokia Health (Withings) Connection",
            "usernames": [
                "madprime",
                "beau",
                "jasonbobe",
                "S_Terry",
                "eramirez",
                "jsonin",
                "padams89",
                "gsdcomo",
                "Whynot",
                "annallull",
                "Fortin",
                "gerwitz",
                "cyberwks",
                "skirb45",
                "Hexaped",
                "coolcole",
                "rbarker01",
                "schlauberg",
                "cathead9",
                "ArloJamesBarnes",
                "gedankenstuecke",
                "wramey82",
                "ericjamesu",
                "chrisfukuoka",
                "benc",
                "Seriema",
                "langolier",
                "igor",
                "Dyfflinviking",
                "rodbegbie",
                "drd2",
                "eye144",
                "Vlad",
                "Matthew_McAteer_1",
                "PressureDrop",
                "willjasen",
                "wctopp",
                "johnthomaskennedy",
                "Pacheco",
                "pizzicato66",
                "joey",
                "timkatje",
                "jgtherrien",
                "r_jbrandt",
                "WhisperCat76",
                "MelissaMaps",
                "Rskillion",
                "eveleker",
                "JoshuaJBerk",
                "Moyerles",
                "lludo",
                "mikeysklar",
                "ShadowPeo",
                "crushingT1D",
                "sumguy",
                "PolaricEntrophy",
                "suman",
                "jsalvi",
                "pwlodarczyk",
                "wallyma",
                "Staje",
                "flamenquim",
                "kmyrmel",
                "wardweistra",
                "nikolay",
                "hugooc",
                "scvegunta",
                "Konvpolto",
                "Komzpa",
                "dbaverstock",
                "saw2112",
                "filo",
                "ivanshim",
                "citizen_c",
                "scribbler",
                "prodan",
                "WestFL",
                "maf",
                "Smurfe",
                "totoCZ",
                "will4n",
                "jtfellows",
                "warriorguy",
                "tchaber",
                "cubicgarden",
                "1MecEnSlip",
                "mcescalante",
                "pawelgawel",
                "toto",
                "gg_urkz",
                "Coding_Lizard",
                "justinlawler",
                "Unidragon",
                "parables",
                "TDYLN",
                "jackybourgeois",
                "katewac",
                "racergirl76",
                "Iain",
                "cowninja",
                "devnull",
                "AndyPaul101",
                "ultimape",
                "snetphilie",
                "hannulan",
                "isaare",
                "nithou",
                "satra",
                "ronswanson",
                "benevides",
                "DanielCalderbank",
                "Anvilar",
                "00waves"
            ]
        }
    ]
}