First, you need to set an Quickbooks key and endpoint through the Backoffice in order to provide the Quickbooks components to your customers. go to the https://developer.intuit.com/app/developer/dashboard to create a new app
Select the name and scope: \
Then you receive your clientID and clientSecret. Also add the redirect URL (https://api.appmixer.com/auth/quickbooks/callback) \
go the Appmixer BackOffice -> Configuration. Add new configuration: appmixer:quickbooks
Add your clientId and clientSecret keys