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.
RESP2/RESP3 Reply
Simple string reply:OK.