How to connect two dApps as having the same user?

[jennifertran]

A response to a forum thread that led to a similar question:

Is it possible to display nft's belonging to users PID in my app?

To clarify, yes, the principal that is used to connect to Internet Identity on the frontend will be different from the identity of the user who owns the NFTs. You could ask the user to input the principal that they used to purchase the NFT. This would “reveal” the identity of the user. As an alternative, you could not use Internet Identity as an authentication. You could require the user to authenticate with the same wallet as they used to get the NFT (ex. Plug).

1. You could ask the user to input the principal. This would “reveal” the identity of the user.

2. As an alternative, you could not use Internet Identity as an authentication. You could require the user to authenticate with the same wallet (ex. Plug).