docs: def create_issue(title, body, repo, token):
      '''create a Github issue, given a title, body, repo, and token.
  
         Parameters
         ==========
         title: the issue title
         body: the issue body
         repo: the full name of the repo
         token: the user's personal Github token
  
      '''
      owner, name = repo.split('/')
      url = 'https://api.github.com/repos/%s/%s/issues' % (owner, name)
      
      data = {'title': title, 'body': body }
  
      headers = { "Authorization": "token %s" % token,
                  "Accept": "application/vnd.github.symmetra-preview+json" }
  
      response = requests.post(url, data=json.dumps(data), headers=headers)
  
      if response.status_code in [201, 202]:
          url = response.json()['html_url']
          bot.info(url)
          return url
  
      elif response.status_code == 404:
          bot.error('Cannot create issue. Does your token have scope repo?')
          sys.exit(1)
  
      else:
          bot.error('Cannot create issue %s' %title)
          bot.error(response.content)
          sys.exit(1)