(node:2828) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): ReplyError: ERR wrong number of arguments for 'flushall' command
(node:2828) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
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I'm a beginner,I want answers,thanks!