I am not aware of a method of connecting to this specific piece of information in the Google Analytics data source. Do you happen to have some more information behind what is being represented by the number? I could possibly make suggestions to work around the issue.
Thank you very much for your answer and help.
The number being represented is the User ID of our customers, so it is a unique value which is assigned to our customers no matter the device they are using to make their purchases. Our customers can purchase either through our website our through our app.
I would like to be able to pull out this dimension from Google Analytics, because this would easily enable us to merge two big Data Sources we are using in our company, which are still not communicating between themselves so far.
I am not sure if you might need some additional information to better understand the problem, but please let me know!
Thank you and have a good day.