how to use User_Authentication with unsplash-js?

[zanpen2000]

now I can use unsplash-js like below:

const unsplashApi = createApi({
  accessKey: xxxxxx,
  fetch: nodeFetch,
});

 var result = await unsplashApi.photos.getRandom({
        orientation: 'portrait',
        query: 'tree',
      });

but when i need to upload a photo to my account, i need to use user-authentication, but how?

can anybody give me some code example, PLEASE?

thanks!