Is there macro password security?

[dan.holmes]

I'm creating a project that uses several steps for Microsoft TFS. Each requires a username and password. Each time the password changes I need to find every occurance and update it. It would be great if I could create a password macro and only update it once per project. I already have a %USER_NAME% macro, however I don't want the password exposed. Is there a way to create a macro for a password that will retain the security of the password?