TYPE
Syntax
        TYPE key
- Available since:
 - 1.0.0
 - Time complexity:
 - O(1)
 - ACL categories:
 - 
              
                
@keyspace,@read,@fast, 
Returns the string representation of the type of the value stored at key.
The different types that can be returned are: string, list, set, zset,
hash and stream.
Examples
RESP2/RESP3 Reply
Simple string reply: the type of key, ornone when key doesn't exist.