Github Authentication with SSH on Mac

“Support for password authentication was removed on August 13, 2021.” – Github

If you go to that link, it has links somewhere on auth articles.

You have many options to authenticate with GitHub

PAM (expiring Personal Access Token) instead of a password
SSH Authentication (link)
Github CLI Authentication (link)

Why use SSH Authentication? (docs.github)

No need to input Personal Access Token for every action
Allows easy routing for multiple Github accounts on a single computer / workstation.

How to setup SSH Authentication?

Step: Check for existing keys (optionally use those) (docs.github)
Step: Create a key pair, add to ssh-agent, update config (docs.github)
Step: Add SSH key to Github (docs.github)

Bash

# Check for existing keys
$ ls -al ~/.ssh

# Create a key 
$ ssh-keygen -t ed25519 -C "your_email@example.com"

# Start ssh-agent
$ eval "$(ssh-agent -s)"

# Try checking for config for newer Macs
$ open ~/.ssh/config
> The file /Users/YOU/.ssh/config does not exist.

$ touch ~/.ssh/config

# Add this text
$ vim ~/.ssh/config
Host github.com
  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile ~/.ssh/id_ed25519

# Add private key to ssh-agent
$ ssh-add --apple-use-keychain ~/.ssh/id_ed25519

# Add SSH public key to clipboard
$ pbcopy < ~/.ssh/id_ed25519.pub

# Copy into github.com
# Find Profile > Settings > SSH and GPG keys > New SSH key

# Now you can clone with the SSH link
$ git clone git@github.com:your_username/your_repo.git

Note: The HTTPS and SSH addresses are different