Script with password unavailable to user

Hello

I am having a hard time searching for this.
I am trying to create a script which i can send to people along with the portable version of the program. The problem is i don't want the people who are running the script to be able to connect to my server for anything else than the script.
Is there a way to do this so that the user cannot connect to the server?

No it's not possible. They need credentials to run the script. There's no way to let them connect using the credentials, while absolutely hiding the credentials way from them.
See also https://winscp.net/eng/docs/guide_protecting_credentials_for_automation