curl --request GET \
  --url https://api.formo.so/v0/top_sources \
  --header 'Authorization: Bearer <token>'

{
  "meta": [
    {
      "name": "project_id",
      "type": "String"
    },
    {
      "name": "referrer",
      "type": "String"
    },
    {
      "name": "visits",
      "type": "UInt64"
    },
    {
      "name": "users",
      "type": "UInt64"
    },
    {
      "name": "hits",
      "type": "UInt64"
    }
  ],
  "data": [
    {
      "project_id": "proj_abc",
      "referrer": "Direct",
      "visits": 612,
      "users": 487,
      "hits": 1024
    },
    {
      "project_id": "proj_abc",
      "referrer": "google.com",
      "visits": 312,
      "users": 268,
      "hits": 542
    },
    {
      "project_id": "proj_abc",
      "referrer": "twitter.com",
      "visits": 184,
      "users": 154,
      "hits": 312
    },
    {
      "project_id": "proj_abc",
      "referrer": "farcaster.xyz",
      "visits": 98,
      "users": 86,
      "hits": 167
    }
  ],
  "rows": 4,
  "rows_before_limit_at_least": 18
}