a method to update model with latest training data
             
        :return: True

def update_model(self):
        
        '''
             a method to update model with latest training data
             
        :return: True
        '''
        
        import requests
        url = self.endpoint_public + '/calculate'
        params = {
            'group': self.group_name
        }
        response = requests.get(url, params=params)
        response_details = response.json()
        
        return response_details['success']