Update keyvalue.py to be able to add new values without leaking them in the shell history.

CHANGELOG.rst

@@ -4,6 +4,11 @@ Changelog
 in development
 --------------
 
+Added
+~~~~~
+
+* Added possibility to add new values to the KV store via CLI without leaking them to the shell history. #5164
+
 Changed
 ~~~~~~~
 

st2client/st2client/commands/keyvalue.py

@@ -256,7 +256,7 @@ def __init__(self, resource, *args, **kwargs):
         self.parser.add_argument(
             "name", metavar="name", help="Name of the key value pair."
         )
-        self.parser.add_argument("value", help="Value paired with the key.")
+        self.parser.add_argument("value", help="Value paired with the key.", nargs="?")
         self.parser.add_argument(
             "-l",
             "--ttl",
@@ -285,10 +285,14 @@ def run(self, args, **kwargs):
         instance = KeyValuePair()
         instance.id = args.name  # TODO: refactor and get rid of id
         instance.name = args.name
-        instance.value = args.value
         instance.scope = args.scope
         instance.user = args.user
 
+        if not args.value:
+            instance.value = input("Please insert value for key: ")
+        else:
+            instance.value = args.value
+
         if args.secret:
             instance.secret = args.secret