I'm trying to test Teamwork graph with a connection to a full sandbox environment. I'm following the documentation for connection, but when I get to "Set up your Salesforce connector" and click the "Authorize Salesforce" button, it takes me to the production login, login.salesforce.com. I tried manually updating the link to test.salesforce.com and using the sandbox user, but that closed and showed a "Error authorizing Salesforce" error back on the Set up your Salesforce connector" screen. Same problem when I try using the custom domain. Is there another method for connecting to sandboxes that I should be using?