class_docstr: Class for interacting with a GitHub repository.
  
  .. note::
  
      To interact with private GitHub repositories that you have access to,
      provide your GitHub personal access token by setting the
      ``GITHUB_TOKEN`` environment variable.
  
  Args:
      repo: the GitHub repository or identifier, which can be:
  
          -   a GitHub URL like ``https://github.com/<user>/<repo>``
          -   a GitHub ref like
              ``https://github.com/<user>/<repo>/tree/<branch>`` or
              ``https://github.com/<user>/<repo>/commit/<commit>``
          -   a GitHub ref string like ``<user>/<repo>[/<ref>]``
code: def _get(self, url, json=True):
      try:
          resp = self._get_session().get(url)
          resp.raise_for_status()
      except requests.exceptions.HTTPError as e:
          if e.response.status_code in (403, 404):
              raise requests.exceptions.HTTPError(
                  (
                      "You can interact with private repositories and avoid "
                      "rate limit errors by providing a personal access "
                      "token via the 'GITHUB_TOKEN' environment variable"
                  ),
                  response=e.response,
              )
  
          raise
  
      resp = resp.json() if json else resp.content
      if isinstance(resp, dict) and "message" in resp:
          error = resp["message"]
          raise ValueError(f"{error}: {self.identifier}")
  
      return resp
  
imports: import logging
  import os
  import re
  import requests
  import eta.core.utils
  import eta.core.web
label_desc: Use image node_id 14 for calling the GitHubRepository obj's underlying member method code with example usage: obj._get(url, json) and returns: resp