code: def authenticate_oauth(oauth_token):
      
      url = _gen_url('acs/api/v1/auth/login')
  
      creds = {
          'token': oauth_token
      }
  
      response = dcos.http.request('post', url, json=creds)
  
      if response.status_code == 200:
          return response.json()['token']
      else:
          return None
docs: Authenticate by checking for a valid OAuth token.
      return: ACS token