docs: def init(self):
          """Init the connection to the InfluxDB server."""
          if not self.export_enable:
              return None
  
          try:
              db = InfluxDBClient(host=self.host,
                                  port=self.port,
                                  username=self.user,
                                  password=self.password,
                                  database=self.db)
              get_all_db = [i['name'] for i in db.get_list_database()]
          except InfluxDBClientError as e:
              logger.critical("Cannot connect to InfluxDB database '%s' (%s)" % (self.db, e))
              sys.exit(2)
  
          if self.db in get_all_db:
              logger.info(
                  "Stats will be exported to InfluxDB server: {}".format(db._baseurl))
          else:
              logger.critical("InfluxDB database '%s' did not exist. Please create it" % self.db)
              sys.exit(2)
  
          return db