Getting strings/variables with dofile()

Hello, I recently joined a good server with CC and hacking and stealing files ect is allowed, I was wanting to make a password and asked some staff on the server a secure way. they said store it on a disk and put it in and use dofile() inside the password program to get the password/username. how would I achieve this, I have no idea what I would need to do.

fs API no dofile needed

If you don't want your files stolen, put them on a disk and keep it in your inventory. Password locks are very easy to bypass.

However, the fs api is the best way to handle data stored in files.