Looker Studio Allow Email

We created a looker studio dashboard/report with the "Enable viewer email address parameter" option selected. Upon going into the report for the first time, the user is asked to grant consent/allow the use of their email. 
The issue we're having is, some users are accidentally choosing to not allow and we have no idea what to do to fix this/re-prompt them. 

We've had the users sign out and back in, try a different browser, and even clear their cookies/cache. 

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