To connect your tastytrade account to Option Alpha, go to Settings --> Trading Accounts and click 'Authorize on tastytrade.com.'
Log in using your tastytrade username and password to authorize your account.
Once your accounts are connected you can select your tastytrade account when creating a new bot to send live orders to the broker for execution.
You can authorize one set of credentials (username/password) per broker. You can connect multiple accounts with the same username.