code: def init(cls, redis_host: str, redis_port: int, is_sentinel_redis=False, redis_sentinel_service="mymaster",
               redis_password=None):
          
          if not cls.redis_helper:
              cls.redis_helper = RedisHelper(host=redis_host, port=redis_port, is_sentinel=is_sentinel_redis,
                                             sentinel_service=redis_sentinel_service, password=redis_password)
docs: Initializes redis connection
          :param redis_host: Hostname of redis server
          :type redis_host: str
  
          :param redis_port: Port at which redis server is listening
          :type redis_port:int
  
          :param is_sentinel_redis: Parameter indicating if redis server is a sentinel server. Default is false
          :type is_sentinel_redis: bool
  
          :param redis_sentinel_service: If redis server is a sentinel server, service name for redis sentinel
          :type redis_sentinel_service: str
  
          :param redis_password: Password for redis connection
          :type redis_password: str