Firstly, Generate an SSH key into your server/localhost
ssh-keygen -t rsa -b 4096 -C "Your Email Address"
You will Get your .ssh/id_rsa.pub. Copy the Key and Add a Aew SSH Key like the above image.
Now register the key with your Github Username
ssh -i ~/.ssh/id_rsa.pub -T your email@example.com
You are Good to go now.
Copy the SSH link and Run it into your server app directory terminal
git clone firstname.lastname@example.org:takielias/tall.git