Once you are at the Bitcoin ATM machine, you will be asked to provide the unique key which is associated with your wallet. This is easily provided simply by scanning the QR code that is associated with your account. Once your QR code has been scanned, simply input the money you wish to convert into cryptocurrencies and the transaction will be complete. To buy cryptocurrencies right now, go to a RockItCoin Bitcoin ATM in Petersburg, FL or visit their website at https://rockitcoin.com/locations/florida/petersburg-fl