I believe that's nostr:nprofile1qqsrs7xetkmms4xr5rfm944hh7dl9zekzc47vsex74fphfcu7w6956gpr9mhxue69uhks6tkv46xzmrt9ehx7um5wgcjucm0d5q3jamnwvaz7tmswfjk66t4d5h8qunfd4skctnwv46z7qg5waehxw309aex2mrp0yhxgctdw4eju6t00n89td's call to action. Wherever Bitcoiners are building things that require users to log in, it should use Nostr to log in. So, if it doesn't support it yet, it should be updated to do so.