Here is instruction how to find proper credentials for Chase Paymentech (Web Payment Plug-In) payment gateway:
1. Go to: https://chase.e-xact.com and login with provided username/password.
2. Open Administration Tab -> Terminals. Here you see two records, one for main account, the second one for terminal.
3. Click on Terminal row. We need from here:
Gateway ID: Input this value into Account Id on Sophio basic store setup page
Password: Input this value into Account Key on Sophio basic store setup page