How can we identify the origin of an app URL?

[axsuul]

How can we distinguish the origin of the App URL? In other words, how can we tell if the user clicked to redirect to the app via "Install" on the Shopify App Listing or if they clicked on the app link from within their own store? It feels like there’s no way to distinguish this. We need to be able to know the source so that we can determine if to log the user in if coming from their own store, vs. treating it as an install if clicking "Install" on the Shopify App Listing but it's impossible to know this since it's all going to the same App URL. 

Any advice on how to handle this? Thank you.

[axsuul]

Bumping this