Question: where to add ssh key in git?
Answer: Copy the SSH key to your clipboard. ... 
In the upper-right corner of any page, click your profile photo, then click Settings.
In the user settings sidebar, click SSH and GPG keys.
Click New SSH key or Add SSH key.
In the "Title" field, add a descriptive label for the new key. ... 
Paste your key into the "Key" field.