code: def configure_mongodb(self):
          
          self._display_info("Trying default configuration")
  
          host = "localhost"
          database_name = "INGInious"
  
          should_ask = True
          if self.try_mongodb_opts(host, database_name):
              should_ask = self._ask_boolean(
                  "Successfully connected to MongoDB. Do you want to edit the configuration anyway?", False)
          else:
              self._display_info("Cannot guess configuration for MongoDB.")
  
          while should_ask:
              self._display_question(
                  "Please enter the MongoDB host. If you need to enter a password, here is the syntax:")
              self._display_question("mongodb://USERNAME:PASSWORD@HOST:PORT/AUTHENTIFICATION_DATABASE")
              host = self._ask_with_default("MongoDB host", host)
              database_name = self._ask_with_default("Database name", database_name)
              if not self.try_mongodb_opts(host, database_name):
                  if self._ask_boolean("Cannot connect to MongoDB. Would you like to continue anyway?", False):
                      break
              else:
                  self._display_info("Successfully connected to MongoDB")
                  break
  
          return {"mongo_opt": {"host": host, "database": database_name}}
docs: Configure MongoDB