3 ms·
It's a combination of the "@", and the forward-slash-looking-but-not-actually-forward-slash characters in the username and password that complete the trick, as
by 0x0000000 3y ago
It's a combination of the "@", and the forward-slash-looking-but-not-actually-forward-slash characters in the username and password that complete the trick, as normal forward slashes are not permitted there.