Redis [Help]How to query redis time by lua script in cluster mode?

-- lua script
...
local a = redis.call("Time")
local current_time = a[1]*1000000 + a[2]
...

I query redis time like by lua script, but it works in standalone mode only, not in cluster mode. How to query redis time by lua script in cluster mode?

Version: Redis 4.0.10 Connector: spring-data-redis/lettuce