Hello Saravana Kumar V,

• Client variables are always stored in the session storage.
• I do not think there is a way to hide them.

Here is a possible solution:

1. Encrypt the SESSION_USER_ID before you store it in client variable. You can do that by creating a client action which converts the SESSION_USER_ID into the encrypted string.
2. Decrypt the SESSION_USER_ID using another client action which will take the encrypted string and decrypt it whenever you want to use it in a aggregate or action or anything else.

As the SESSION_USER_ID will only last until the session is active, we should not worry about its deletion. It will automatically get deleted after the session ends.

READ THE FOLLOWING QUESTIONS THAT MIGHT HELP YOU:

1.https://www.outsystems.com/forums/discussion/55664/reactive-web-set-client-variable-using-server-logic/

Hope this helps!

Hi saravana kumar V, 

Check out here where to find the client variables

https://success.outsystems.com/documentation/11/reference/outsystems_language/data/handling_data/client_variable/

Hope that it helps you 

I believe you can not encrypt the "$OS_Users$$ClientVars$$SESSION_USER_ID" variable because it is set by OutSystems.