SHELL

git clone password authentication failed

you have not set your github username and password into your windows credentials. that's why this giving error.

add github credentials in your window

add your github account url, username and token password into your windows credentials.

1. go to window and search "credentials manager"
2. go to window credentials
3. click on "add a generic credential"

then perform this 

NOTE: you can take 

github url: git:https://github.com
username: -----------
password: ---------