One of the most tedious and error-prone tasks of a web developer is managing account details. The reason this is so difficult is because it has to be perfect. If a user cannot log in, most sites are useless. It's also really important to maintain the security of user accounts, allow users to update their information, change their passwords, and many other administrative tasks.
This functionality must be present in almost all major websites and applications. This is another area where Django can save a lot of time and effort, while improving the quality of your software. By providing a standard user account system, developers can avoid the headaches inherent in writing their own user code or developing an in-house library.
All Django sites can use the same authentication interface, thus relieving developers not just of the burden of developing their own interface, but also of maintenance. Django's auth module is heavily used and rigorously tested, so when bugs are found...