I see descriptions of partner programs, and would like to pursue test development of an app that required full OAuth authentication. We can do some development using test API keys, but real testing requires access communication with Canvas servers sharing our client ID and secret. I am guessing this requires 'certified' partnerships, but don't see a way to apply. The partnership application form has been filled out, but no responses ever were received. An e-mail from 'partnerships' tells me that to do the testing I need, I need to get a 'partner sandbox' -- without mentioning how to get one.