crowd as the rule of posts does not allow post replies but will try to be clear tips! I am Brazilian and I speak English but I’m trying to help by using the google translator.
At this stage to find the answers (User and Password) you need to know to understand the functioning of directories. Assuming the need to locate the folder A in url https://www.hackthis.co.uk
we could try so https://www.hackthis.co.uk/levels/A
ie inspencionar to the source code of this phase between the tag < fieldset> fieldset>
you will get the folder path that shows the username and password just by the correct combination, remember u 4 this mission. said grace and the desevendar alone, otherwise always depend on someone to give you the answer. Hope this helps.
“… just know that I know nothing …”