title: Git Push - Permission Denied
body: <p>I'm new to GitHub and experimenting with my first repo. I'm using my Mac which was used by my friend for few days. Now the problem is, as I tried to push my first commit, I see an error that says - </p>
  
  <pre><code>remote: Permission to myUserName/repo.git denied to myFrndsUserName.
  fatal: unable to access 'https://github.com/myUserName/repo.git/': The requested URL returned error: 403
  </code></pre>
  
  <p>I understand that my friend has used his credentials earlier and those are mismatching with my credentials as I tried to push my code. In best case, I would like to replace my friend's credentials with mine and I don't have to give my username and password everytime for different repos that I create in the near future.  </p>
  
  <p>Can somebody help me with this? Thank you.</p>