code: def from_response(raw_response):
          
          json_response = raw_response.json()
          error_info = json_response["error"]
          code = error_info["code"]
  
          try:
              error_cls = _error_map[code]
          except KeyError:
              raise NotImplementedError(
                  "Unknown error code '{}' returned in Yelp API response. "
                  "This code may have been newly added. Please ensure you are "
                  "using the latest version of the yelp-python library, and if "
                  "so, create a new issue at https://github.com/Yelp/yelp-python "
                  "to add support for this error.".format(code)
              )
          else:
              return error_cls(raw_response, **error_info)
docs: The Yelp Fusion API returns error messages with a json body
          like:
          {
              'error': {
                  'code': 'ALL_CAPS_CODE',
                  'description': 'Human readable description.'
              }
          }
  
          Some errors may have additional fields. For example, a
          validation error:
          {
              'error': {
                  'code': 'VALIDATION_ERROR',
                  'description': "'en_USS' does not match '^[a-z]{2,3}_[A-Z]{2}$'",
                  'field': 'locale',
                  'instance': 'en_USS'
              }
          }