unique user name but duplicate password I'm having a developer work on a site for me.  I'm being told that each user must have a unique username.  That makes sense.  I'm also told that they all need to have a unique password.  This doesn't make sense and is causing problems for me client.
Shouldn't a unique combination of username and password be what's required?
Can anyone help direct me to a solution?
Users can have the same password, but they cannot have the same username by default. Theoretically, users could have the same username with some customization, but they would need to log in with something else that makes them unique such as an e-mail address.