Right now, auto-saving a login is only available with the Bitwarden browser extension, but feel free to submit the idea as a Feature Request for future improvement!
One question: What is the point of a password manager that does not save logins automatically? If I have to enter everything manually for every page, it’s pointless. LastPass does it. And since more people are working with mobile devices, i.e. smartphones, this should be a matter of course.