Note: This is for Mac/Linux users.
cd $HOME/.ssh
ssh-keygen
[here just create the name codecommit_rsa and leave all fields blank *just click enter*]
cat codecommit_rsa.pub
Now we need to enter our codecommit_rsa.pub into IAM.
touch config
chmod 600 config
nano config
Host git-codecommit.*.amazonaws.com
User [YOUR_SSH_KEY_ID_FROM_IAM]
IdentityFile ~/.ssh/codecommit_rsa
Now lets test to verify it works.
ssh git-codecommit.us-east-1.amazonaws.com
You have successfully authenticated over SSH. You can use Git to interact with AWS CodeCommit. Interactive shells are not supported.Connection to git-codecommit.us-east-1.amazonaws.com closed by remote host.