Produces a single, populated ADUser object through the object factory.
        Does not populate attributes for the caller instance.

        :param str base_dn: The base DN to search within
        :param str samaccountname: The user's sAMAccountName
        :param list attributes: Object attributes to populate, defaults to all
        :param bool explicit_membership_only: If set True, memberof will only
            list groups for which the user is a directly referenced member

        :return: A populated ADUser object
        :rtype: ADUser

def user(self, base_dn, samaccountname, attributes=(), explicit_membership_only=False):
        """Produces a single, populated ADUser object through the object factory.
        Does not populate attributes for the caller instance.

        :param str base_dn: The base DN to search within
        :param str samaccountname: The user's sAMAccountName
        :param list attributes: Object attributes to populate, defaults to all
        :param bool explicit_membership_only: If set True, memberof will only
            list groups for which the user is a directly referenced member

        :return: A populated ADUser object
        :rtype: ADUser
        """

        users = self.users(base_dn, samaccountnames=[samaccountname],
                           attributes=attributes, explicit_membership_only=explicit_membership_only)

        try:
            # Usually we will find a match, but perhaps not always
            return users[0]
        except IndexError:
            logging.info("%s - unable to retrieve object from AD by sAMAccountName", samaccountname)