GET
/ext/{siteid}/api/v1/guestuser/u/{username}
curl \
--request GET 'https://api.spotipo.com/ext/{siteid}/api/v1/guestuser/u/{username}' \
--header "Authentication-Token: $API_KEY"
curl \
--request GET 'https://api.spotipo.com/ext/{siteid}/api/v1/guestuser/u/{username}' \
--header "Authentication-Token: $API_KEY"