What is Username and Password Authentication?
Username and password authentication is the most commonly used and best-known method to authenticate a user. It is the traditional method for logging into portals, applications, infrastructure, systems, etc. The authentication principle is based on the "something you know" (the password) factor.
Every user usually not only knows the username and password authentication method, but also has been using the methods for years. Additionally, the username and password login method is the easiest and also cheapest to implement. If used together with another factor within the multi-factor authentication method it can also achieve the highest security standards.