changed "setUserID" to actually use the supplied user id and not the literal string @"userId" if email is supplied, sets the email as the userId and not a global user property (this wipes out other global user properties)
changed "setUserID" to actually use the supplied user id and not the literal string @"userId"
if email is supplied, sets the email as the userId and not a global user property (this wipes out other global user properties)

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