This error means that the SSH key type you used was unrecognized or is unsupported by your SSH client.| GitHub Docs
This error means your version of ssh-add does not support macOS keychain integration, which allows you to store your passphrase in the keychain.| GitHub Docs
Before you generate an SSH key, you can check to see if you have any existing SSH keys.| GitHub Docs
To configure your account on GitHub.com to use your new (or existing) SSH key, you'll also need to add the key to your account.| GitHub Docs
You can secure your SSH keys and configure an authentication agent so that you won't have to reenter your passphrase every time you use your SSH keys.| GitHub Docs
Using the SSH protocol, you can connect and authenticate to remote servers and services. With SSH keys, you can connect to GitHub without supplying your username and personal access token at each visit. You can also use an SSH key to sign commits.| GitHub Docs