#first Run this Command. there should be same progress.
$ ssh-keygen -t ed25519 -C "your_email@example.com"
# then Copy the SSH Key. and paste in to the github ssh keybox.
# to Copy the code. and Make sure you are Copying the .pub (public key)
cat ~/.ssh/ssh_key_name.pub
#start the SSH Agen in Background
eval "$(ssh-agent -s)"
#add your ssh key to ssh-agent.
#and make sure your added the private key not .pub(public key)
ssh-add ~/.ssh/ssh-keyname