docs: def initauth(self):
          """Initialise authentication, for internal use"""
          headers = {'User-agent': 'CLAMClientAPI-' + clam.common.data.VERSION}
          if self.oauth:
              if not self.oauth_access_token:
                  r = requests.get(self.url,headers=headers, verify=self.verify)
                  if r.status_code == 404:
                      raise clam.common.data.NotFound("Authorization provider not found")
                  elif r.status_code == 403:
                      raise clam.common.data.PermissionDenied("Authorization provider denies access")
                  elif not (r.status_code >= 200 and r.status_code <= 299):
                      raise Exception("An error occured, return code " + str(r.status_code))
  
  
                  data = self._parse(r.text)
                  if data is True: #indicates failure
                      raise Exception("No access token provided, but Authorization Provider requires manual user input. Unable to authenticate automatically. Obtain an access token from " + r.geturl())
                  else:
                      self.oauth_access_token = data.oauth_access_token
  
              headers['Authorization'] = 'Bearer ' + self.oauth_access_token
          return headers