To add AuthPro HTML codes to your Wix website you can use HTML widget accessible via Add -> Widgets -> HTML -> Blank HTML. After adding HTML widgets you can paste AuthPro code by clicking on widgets and selecting 'Settings' menu.
Here is sample screenshot for adding custom HTML code to your Wix.com website:
Here is sample video for creating password protected page on your Wix.com website (please open in full screen for better view):
Here is sample website created with Wix for demontration of AuthPro service installation:
View demo website
Please contact us if you have any questions.