Create a Key Pair
The below will create a keypair and save it to your SSH folder.
aws ec2 create-key-pair --profile "<profile>" --region "<region>" --query "KeyMaterial" --output "text" --key-name "<key_name>" > ~/.ssh/<key_name>
Delete a Key Pair
aws ec2 create-key-pair --profile "<profile>" --region "<region>" --key-name "<key_name>"