Password protection on PirateBox android.

I know the title conflicts with the very existence of piratebox and its sole purpose of creation, but my situation begs for a password protected access to the page or its content. I'm just a random language teacher with no knowledge of programming at all. So detailed and easy guidelines are really appreciated. Now onto my real problem:

Some stranger keeps uploading adult contents on the piratebox and there's no known way for me to stop him. If only I could password protect my piratebox, me and my students would feel safe and secure. I'm using PirateBox for android v0.5.8

P.s. I tried two of the methods from this forum but to no vail. I'm in desperate need of a solution. Please, do help!

[forum.piratebox.cc]

REFER THIS LINK HERE IS THE SOLUTION FOR IT