Cross device tracking with user ID (authenticated sites/apps) I´ve many questions in regard of cross-device tracking:1. We have many websites and a couple of apps (authenticated ones) that we would like to track the users. For instance, one of our products has an app and web version and some customers use both. But on a monthly basis, this user is the same for us, regardless of the platform it used, so we would like it to be unique (active user). What would be the best way to track this user? Would it be using our authentication ID (userID) since this ID is unique for each user?We do have a global report suite that we would also like to know about this user journey among all our authenticated products. What are the options to accomplish that?2. setting up a user ID.for our websites we already have that, we have an userID eVar that is the same in all our report suites, including the global one, and getting the userID from a data layer. However, we are struggling to do the same for our app. In the app, I do understand the general idea tha
