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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_users(self):
 """Get all users of the portal """

        # We make use of the existing controlpanel `@@usergroup-userprefs`
        # view logic to make sure we get all users from all plugins (e.g. LDAP)
        users_view = UsersOverviewControlPanel(self.context, self.request)
        return users_view.doSearch("")