authorization: ********************
{ "country": "CA" }
curl --location --request POST '/fd2024/checkin' \ --header 'authorization: <api-key>' \ --header 'Content-Type: application/json' \ --data-raw '{ "country": "CA" }'
{ "ret": 0, "errmsg": "string", "data": { "affected": true, "coins": 0 } }