Thanks @MrR3boot , learned couple things 
The route to user was quite fun (and thankfully it was not as much trouble as Player).
I quickly found my way to the “under construction” page, but got stuck there for some time. For anyone else in a similar position, my hint is that the vulnerability used to get there is correct but it needs an uplift. Perhaps taking a look at PayloadsAllTheThings would help (if you got to the under construction page you will know where to look in the repo).