Creates an instance of github.Github to interact with the repos via the 
        API interface in pygithub.

def _get_github(self):
        """Creates an instance of github.Github to interact with the repos via the 
        API interface in pygithub.
        """
        from github import Github
        vms("Querying github with user '{}'.".format(self.username))
        g = Github(self.username, self.apikey)
        self._user = g.get_user()
        if self._user is None:
            raise ValueError("Can't authenticate to github with '{}'.".format(self.username))
        #The github user authenticating always has to be specified; however the user
        #may not be able to see the repo, even if it has access to it. We may need
        #to check the organization repos.
        if self.organization is not None:
            self._org = g.get_organization(self.organization)
            vms("Found github organization '{}'.".format(self._org.name), 2)

            #Next we need to find this repository in the lists available to both
            #the user *and* the organization. If they specified an organization, then we
            #should check that first/exclusively.
            for repo in self._org.get_repos():
                if repo.full_name.lower() == self.name.lower():
                    self._repo = repo
                    vms("Found organization repository '{}'.".format(self._repo.full_name), 2)
                    break
        else:
            for repo in self._user.get_repos():
                if repo.full_name.lower() == self.name.lower():
                    self._repo = repo
                    vms("Found user repository '{}'.".format(self._repo.full_name), 2)
                    break