User Authentication design pattern?

[terrydoang]

I read http://www.sitepoint.com/building-a-domain-model/
And, I don’t find any authenticate($email, $password) method to check if the user email and password exists
Where should the method authenticate($email, $password) exists ?
Should it be in the User class, or UserMapper class, or should we need to build UserAuthenticate Class ?

[fretburner]

Hi Terry,

I know you posted this question over a week ago, but I only just noticed it while looking over the unanswered threads.

@terrydoang

Should it be in the User class, or UserMapper class, or should we need to build UserAuthenticate Class ?

Adding the functionality to the User or UserMapper classes would violate the Single Responsibility Principle (SRP), so yes, it would be better to create a separate authentication service to deal with logging users in and out.