ZMSCORE key member [member ...]
Available since: 6.2.0
Time complexity: O(N) where N is the number of members being requested.
ACL categories:
@read
@sortedset
@fast
Returns the scores associated with the specified members in the sorted set stored at key.
For every member that does not exist in the sorted set, a nil value is returned.
Return
Array reply: list of scores or nil associated with the specified member values (a double precision floating point number),
represented as strings.