HSCAN
Syntax
        HSCAN key cursor [MATCH pattern] [COUNT count]
- Available since:
 - 2.8.0
 - Time complexity:
 - O(1) for every call. O(N) for a complete iteration, including enough command calls for the cursor to return back to 0. N is the number of elements inside the collection.
 - ACL categories:
 - 
              
                
@read,@hash,@slow, 
See SCAN for HSCAN documentation.
RESP2/RESP3 Reply
Array reply: a two-element array.
- The first element is a Bulk string reply that represents an unsigned 64-bit number, the cursor.
 - The second element is an Array reply of field/value pairs that were scanned.