code: def set_config(
              self,
              section='MONGODB',
              option='uri',
              default_value=DEFAULT_DB_URI
      ):
          
          t = {'section': section, option: default_value}
          self.client.quantaxis.usersetting.update(
              {'section': section}, {'$set':t}, upsert=True)
docs: [summary]
  
          Keyword Arguments:
              section {str} -- [description] (default: {'MONGODB'})
              option {str} -- [description] (default: {'uri'})
              default_value {[type]} -- [description] (default: {DEFAULT_DB_URI})
  
          Returns:
              [type] -- [description]