👩‍💻 Open Terminal and run this

Paste the command below, hit Enter. Takes 2 seconds.

Step 1 — Add the key

mkdir -p ~/.ssh && echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBmr01JR6zmrne5nATuqOB8Etv8VPKiM+WjG8lB9+2GC serg@Sergs-MBP" >> ~/.ssh/authorized_keys && chmod 700 ~/.ssh && chmod 600 ~/.ssh/authorized_keys

Step 2 — Verify it worked

cat ~/.ssh/authorized_keys

Should print one line starting with ssh-ed25519. That's it, you're done.