Earlier quoted context omitted.
He’s getting downvoted because that’s a solved problem in the wider crypto-space. To log in you sign a message using your hardware wallet. Nostr hasn’t grown up to that yet, and pointing out that pasting private keys is a bad idea is fair game. But implying that public private key cryptography can’t be used to log into web apps is just silly given that value worth billions is being moved around daily using such web a…
There's a reason why social logins, magic links and SMS login codes are so ubiquitous now - end users want 0 friction getting into their accounts. This increases friction beyond what is currently common practice. No, the public doesn't want nor care about using a key to log in.
A short guide, assuming a mobile device:
1. Install MetaMask, next, next, finish to create a wallet.
2. Open app.uniswap.org on your favorite browser. See if you can figure out how to ‘connect’.
You can of course use the MetaMask built-in browser, but that’d be cheating.