curl --request POST \
  --url https://api.sorsa.io/v2/check-member \
  --header 'ApiKey: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "community_id": "1966045657589813686",
  "user_handle": "twitter",
  "user_id": "<string>"
}
'

{
  "is_member": true
}