/**
 * Pushes the given element's local branch name up to
 * the remote branch name on github.
 *
 * returns a promise
 */
async function pushBranch(
    element: ElementRepo, localBranchName: string, remoteBranchName: string) {
  const remote = await element.repo.getRemote('origin');

  return remote.push(
      ['refs/heads/' + localBranchName + ':refs/heads/' + remoteBranchName], {
        callbacks: {
          credentials() {
            return nodegit.Cred.userpassPlaintextNew(
                GITHUB_TOKEN, 'x-oauth-basic');
          }
        }
      });
}

 credentials: function () {
     return Git.Cred.userpassPlaintextNew(token, "x-oauth-basic");
 }

 credentials: function(url, userName) {
   return nodegit.Cred.sshKeyFromAgent(userName);
 }

 credentials: function () {
   return Git.Cred.userpassPlaintextNew(getUsernameTemp(), getPasswordTemp());
 },