def gravatar_url(options = {})
      raise ArgumentError, "The size parameter must be an integer" if options[:size] && !options[:size].is_a?(Integer)
      response = api_response("user-information")
      hash = response["user_information"]["gravatar"]

      return nil if hash.nil?
      return build_gravatar_url(hash, options)
    end
def gravatar_url(options = {})
      raise ArgumentError, "The size parameter must be an integer" if options[:size] && !options[:size].is_a?(Integer)
      response = api_response("user-information")
      hash = response["user_information"]["gravatar"]

      return nil if hash.nil?
      return build_gravatar_url(hash, options)
    end
Returns the Gravatar image URL using the Gravatar hash from the user's information.

 @param options [Hash] optional settings for the gravatar URL.
 @return [String, nil] the Gravatar URL, with the optional size parameter, nil if
   the user information contains no Gravatar hash.