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

def init(cls, redis_host: str, redis_port: int, is_sentinel_redis=False, redis_sentinel_service="mymaster",
             redis_password=None):
        """
        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

        """
        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)