This gist tells you how to download a skillshare course playlist without any signup.
Go to https://colab.research.google.com/github/calvinhobbes23/Skillshare-DL/blob/master/Skillshare_DL_[KENWAY].ipynb#scrollTo=W4DvOJaqsGaj
Signin with a gmail ccount (I recommend a fake gmail account)
Make sure that there is enough space in your Google Drive since this script downloads and transfers the videos to the Google Drive of the account provided.