You can do it from two places:
1. Go to Proxioshowcase.com Click "login to my account" button at the top, add your email address and password (or your username and password from https://proxioconnect.com then click log in.
2. Go to https://proxioconnect.com, add your username and password then click "log In"
Once logged In, just Click the "Proxio Developer Showcase" button and this will take you to your Agent's Dashboard.