On Shopwave POS go to Settings and then Payments.
In Payments, select Square as your chosen payment provider.
Enter your Square login credentials.
Once your credentials have been entered correctly, a device code will be generated and displayed on your POS.
From your Square terminal, click "Sign In".
Next, select "Use a Device Code".
Now enter the 6 character code displayed on your POS terminal into your Square terminal.
Click "Sign In".
You're now ready to accept Square Payments!