If you created your key with a different name, or if you are adding an existing key that has a different name, replace id_{% ifversion ghae %}rsa{% else %}ed25519{% endif %} in the command with the name of your private key file.
If you created your key with a different name, or if you are adding an existing key that has a different name, replace id_{% ifversion ghae %}rsa{% else %}ed25519{% endif %} in the command with the name of your private key file.