If you have an iTunes Connect account, you can easily access your Apple Reporting in Revelator.
Navigate to Data Services in Revelator, and select iTunes Connect. Enter your login details / Apple ID credentials as you would on Apple's portal and click save to close the pop up window.
Your financial reports and consumption data will begin to be available automagically in Revelator.
If you do not have an iTunes Connect account, you can apply for one using the official application:
https://itunesconnect.apple.com/WebObjects/iTunesConnect.woa/wa/apply
For all other questions about accessing your iTunes Connect account, we recommend consulting the official Apple documentation: https://itunespartner.apple.com/en/music/faq