Install kali linux tools for elementary os/ubuntu no pgp key issues

All google results ended with pgp key error. The system was so messed that it had to be restored from Timeshift backup. I found only one solution that worked

Original tutorial is here https://www.youtube.com/watch?v=RrYB-UumTr0

In case the video is removed these are the steps:

1. Go to https://launchpad.net/ and search for "Kali linux".
2. Click on the first result: Kali Linux Tools PPA 1 : wagung
3. In software center open software sources and go to tab other software
4. Click add and paste bold part: ppa:wagungs/kali-linux to add it
5. This will have to be done for another 2 PPAs so I post them here:

ppa:wagungs/kali-linux1
ppa:wagungs/kali-linux2

Now this should be available in software center.