How to get user email by ID on Message extension created using Microsoft Bot Framework?

Prithvi-MSFTThanks for the update. The issue is only when we call the extension from the topbar command box like @appname:<search text> and in other situations we are able to get the user details using the folowing code

const member = await TeamsInfo.getMember(
          context,
          context.activity.from.id
      );

 Is the above method will not work if we do the search from command box?