docs: def create_database():
      """ creates database if necessary """
      db = get_db()
      response = db.query('SHOW DATABASES')
      items = list(response.get_points('databases'))
      databases = [database['name'] for database in items]
      # if database does not exists, create it
      if settings.INFLUXDB_DATABASE not in databases:
          db.create_database(settings.INFLUXDB_DATABASE)
          print('Created inlfuxdb database {0}'.format(settings.INFLUXDB_DATABASE))