Add a button to site html + make it work/javascript/php/API / cryptocurrency

Read description before applying! I need a button in my browsergame that when you click on it it logs in to steemconnect and players are able to pay with STEEM (cryptocurrency) There is documentation about the API's Should not take long if you know html/php/javascript and you know what you do items are priced in USD so we need API to get how much STEEM they need to pay That's all. I need it fast and need it now. If you can complete in the next 2-3 hours contact me.