Having users login your website using username and password combination is an old technology.
We do not want to keep record of users, and we sure do not want users to add another password to thier list of passwords to remember

So, best solution, is to have users login using other accounts, we chose Linkedin, it is professional, secured, and everybody has one (or should be)

This is our solution on including Linkedin login into websites (Classic ASP) with no need to have any DB to save those records

It is widely used accross our websites like MyResume.cc, ANmar.Systems, etc.