Mn-user-info does not exit and retrieves info from all sharders

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The issue title suggests a problem with the 'mn-user-info' command not exiting and retrieving info from all sharders. Since the issue body is empty, start by examining the CLI command implementations in the codebase, particularly any commands related to miner (mn) user info. Look for loops or network calls that might not terminate. Check the GoSDK integration for sharder communication. Understanding the blockchain sharding architecture and the specific smart contracts involved is necessary to diagnose the non-exit behavior.

Written by the indexing model from the issue text.