code: def SetAuth(self, style, user=None, password=None):
          '''Change auth style, return object to user.
          '''
          self.auth_style, self.auth_user, self.auth_pass = \
              style, user, password
          return self SetAuth(self, style, user=None, password=None):
          '''Change auth style, return object to user.
          '''
          self.auth_style, self.auth_user, self.auth_pass = \
              style, user, password
          return self
docs: Change auth style, return object to user.