npm install --save cimpress-customizr

import {CustomizrClient} from 'cimpress-customizr'

const client = new CustomizrClient({
    // The resource you'd like to get/put the settings from/to.
    // You can either provide it here or directly in the get/putSettings methods
    resource: undefined,
    
    // The timeout to use for the network call. Default 3000ms
    timeout: 3000,
    
    // The address of Cimpress Customizr service
    baseUrl: 'https://customizr.at.cimpress.io',
    
    // How many try to retry the request in case of network error or 5xx response
    retryAttempts: 2,
    
    // How long to wait between retries in milliseconds
    retryDelayInMs: 1000
});

client.getSettings(accessToken, resource).then(data => ...)

client.putSettings(accessToken, newData, resource).then(data => ...)

import {
    getMcpSettings, 
    setMcpSettings,
    
    setPreferredMcpSettings,
    
    getPreferredMcpLanguages, 
    setPreferredMcpLanguage,
    
    getPreferredMcpTimezone,
    setPreferredMcpTimezone
    
    getMcpRegionalSettings, 
    setMcpRegionalSettings
    
    } from 'cimpress-customizr'
    
    
setPreferredMcpSettings(accessToken, 'eng', 'en-US', 'Europe/Amsterdam').then(() => {})

getPreferredMcpLanguages(accessToken).then( languageArray => {
    /* 
    
    languageArray = [language, ... ]
    
    language = {
         lang: 'en' 
         iso639_1: 'en',
         iso639_2: 'eng',
         iso639_3: 'eng'
     }
    */

} )

setPreferredMcpLanguage(accessToken, newLanguage).then( ... )