Download the file to your PC.
Open the file, you’ll notice that there’s a bunch of nonsensical text in there.
Change the file extension. The data is not readable in txt format.
The file extension is jpg. You may need to use trial and error to come to this by yourself.
Press Yes when asked. The file will not become unstable.
Open the image, or just look at the thumbnail!
There’s the username and password to complete the level!