Entering passwords or email addresses on public PCs or laptops is both scary and annoying. Please add a feature where we can scan a QR code from the ProtonMail sign-in page on mobile. This way, we don't have to expose our email addresses and passwords, even if we have 2FA enabled. Sharing email addresses can result in spam and countless failed login attempts. I need this feature, and I switched to ProtonMail because of these concerns.