If I have a user's email address, how can I get the actual user? I seem to remember a function that could accomplish this but can't find it now.
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You can use the plugin Personalization Utilities and either userSearch function or getusersby function, I do prefer to use getusersby function.
usersearch({"email"},{1},{ri!email}) getusersby(ri!email,3,1)
Regards
Suresh