Sitecore User Login

C#

private static string Domain = "extranet";

public static bool Login(string email, string password)
{
    var username = string.Format(@"{0}\{1}", Domain, email);
           
    try
    {
        if (Sitecore.Security.Authentication.AuthenticationManager.Login(username, password))
        {
            return true;
        }
    }
    catch (System.Security.Authentication.AuthenticationException exception)
    {
        // log error
    }

    return false;
}