Login into your WeFact account and go to "Settings" > "API"

Check the box to enable the API

Enter the IP address "45.76.33.112" to the whitelist

Save all the settings

Copy the security code from WeFact

Go back to RCUR and go to Settings > Integrations

Choose the invoice app "WeFact"

Paste the WeFact security code

Your account is now connected and the invoice features are activated