UNWATCH
Syntax
        UNWATCH
- Available since:
- 2.2.0
- Time complexity:
- O(1)
- ACL categories:
- 
              
                @fast,@transaction,
Flushes all the previously watched keys for a transaction.
If you call EXEC or DISCARD, there's no need to manually call UNWATCH.
Return
Simple string reply: always OK.