hey am trying to learn git and i im getting error fatal: could not read from remote repo

I signed up on Github and then made private repo named lgit ("learn git") to at least try to test run command from the terminal but I am getting an error while trying to clone repo to my machine.

r3tr0@iCBM:~/test/gittest$ git clone git@github.com:username/lgit-rep.git
Cloning into 'lgit-rep'...
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

Solution

Because you're trying to clone your repo at local with SSH. You can check @Luck's answer for this.

Or with username and password, you can clone your repo with https, get the git https to clone like below.