title: git push not working , error is "The requested URL returned error: 403"
body: <p>i am learning git veriosn control and trying to push code to repository ,but i am facing two erros</p>
  <p><strong>1:remote: Permission to username/repo name denied to &quot;username&quot;.</strong></p>
  <p><strong>2 fatal: unable to access <a href="https://github.com/username/repositoryname/" rel="nofollow noreferrer">https://github.com/username/repositoryname/</a>: The requested URL returned error: 403</strong>**</p>