watch ESPN app on other networks - XFinity

Recently our in laws were visiting. They have an Xfinity triple play type service. We have Internet only. Every time they tried to log in to the watch ESPN app on their tablet (WIFI ONLY) it would automatically authenticate to our Xfinity account through the router which would then deny them access due to us not having a TV subscription. Is there a way to bypass this automatic identification on WIFI so that they can access the content they pay for when they are visiting us?

This question, "watch ESPN app on other networks," is about XFinity-Comcast TV Television Apps.

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