https://xyz-minictf.herokuapp.com/
Here in this branch I added my own database which I used in the development process. Therefore admin and other users are already there with some challenges to test. Below are the few credentials to use.
thrones:12345678
test:qwertyuiop
$ git clone https://github.com/DivyanshuSahu/miniCTF.git
$ git checkout local
$ python manage.py runserver
Then use above credentials to log in.