code: def authenticate(self):
          
          endpoint = os.path.join(self.config.get('napps', 'api'), 'auth', '')
          username = self.config.get('auth', 'user')
          password = getpass("Enter the password for {}: ".format(username))
          response = requests.get(endpoint, auth=(username, password))
          if response.status_code != 201:
              LOG.error(response.content)
              LOG.error('ERROR: %s: %s', response.status_code, response.reason)
              sys.exit(1)
          else:
              data = response.json()
              KytosConfig().save_token(username, data.get('hash'))
              return data.get('hash')
docs: Check the user authentication.