MLB.tv with Extra Innings Package

Anyone know how to set up the MLB.tv account that comes with the Extra Innings Package? I order the package 2 days ago and whenever I try and link my account through MLB.tv, all it does is take me to the page that shows how to order Extra Innings through the voice remote. (https://www.xfinity.com/learn/digital-cable-tv/sports/mlb/extra-innings?lang=en&ui_style=dark)

I would like to be able to access MLB.tv so I can watch spring training games.