Hello, landlord! This is the reason why ssh-key is not configured. You can press this keyword to search for related articles.

errors are placed and then please tells you what you need to do
1: you don't have permission
2: there is no

can't be cloned in the warehouse, it's just a question of permission, whether you set up a user name and mailbox

alas, Basic Auth, is supported in Git 2.7and above, for example:

git clone https://github.com/geekfeier/meal

then enter the user name and password step, of course, your clone problem, because you are using the SSH method to clone, your SSH key is problematic. The key you produce needs to be added to GitHub's warehouse before it can be read.