docs: async function setPreferredMcpSettings(accessToken, languageCode, languageTag, timezone) {
      let preferredLanguage = getValidLanguageOrThrow(languageCode);
      let preferredRegionalSettings = getValidLanguageTagOrThrow(languageTag);
      let preferredTimezone = getValidTimezoneOrThrow(timezone);
  
      const mcpSettings = await getMcpSettings(accessToken);
  
      return await mcpCustomizr.putSettings(accessToken, {
          language: updatePreferredLanguage(preferredLanguage, mcpSettings.language),
          regionalSettings: preferredRegionalSettings,
          timezone: preferredTimezone,
      });
  }