salesforce connector : how to setup for sandbox test?

Hello everyone. My client want to do some data integration between salesforce and mendix, so I am testing out the salesforce connector module here : I created a connected app in my sandbox and use the credential to fill in this page. But after I click web server authorization, it redirected me to which I can not login to. ( My sandbox need to be logged in through ) Anyone has experience with this can help me please? 
1 answers

The authentication url is set in the constant of the module.

User Ctrl+F and enter OAuthEndpointAuthorization and press Find. This will yield 2 results, double click on the constant and you can change the location there from ‘’ to what you need.