How to use the wtf_wikipedia.from_api function in wtf_wikipedia

return new Promise((resolve, reject) => {
    wtf_wikipedia.from_api(country.name.common, 'en', function (markup) {
      console.log(markup)
      var wiki = wtf_wikipedia.parse(markup)
      if (wiki.type === 'disambiguation') {
        console.log(country.name.common, 'disambiguation. fetching flag from +(country)')
        return wtf_wikipedia.from_api(country.name.common + ' (country)', 'en', function (markup) {
          var wiki = wtf_wikipedia.parse(markup)
          console.log(country.name.common, '(country) wiki', wiki)
          console.log(country.name.common, '(country) infobox', wiki.infobox)
          if (wiki.infobox && wiki.infobox.image_flag && wiki.infobox.image_flag.text) {
            console.log(country.name.common, '(country) flag', wiki.infobox.image_flag.text)
          }
          resolve(wiki.infobox)
        })
      }
      console.log(country.name.common, 'infobox', wiki.infobox)
      if (wiki.infobox && wiki.infobox.image_flag && wiki.infobox.image_flag.text) {

wtf_wikipedia.from_api(country.name.common, 'en', function (markup) {
      console.log(markup)
      var wiki = wtf_wikipedia.parse(markup)
      if (wiki.type === 'disambiguation') {
        console.log(country.name.common, 'disambiguation. fetching flag from +(country)')
        return wtf_wikipedia.from_api(country.name.common + ' (country)', 'en', function (markup) {
          var wiki = wtf_wikipedia.parse(markup)
          console.log(country.name.common, '(country) wiki', wiki)
          console.log(country.name.common, '(country) infobox', wiki.infobox)
          if (wiki.infobox && wiki.infobox.image_flag && wiki.infobox.image_flag.text) {
            console.log(country.name.common, '(country) flag', wiki.infobox.image_flag.text)
          }
          resolve(wiki.infobox)
        })
      }
      console.log(country.name.common, 'infobox', wiki.infobox)
      if (wiki.infobox && wiki.infobox.image_flag && wiki.infobox.image_flag.text) {
        console.log(country.name.common, 'flag', wiki.infobox.image_flag.text)
        country.flag = 'https://en.m.wikipedia.org/wiki/File:' + wiki.infobox.image_flag.text
      }
      resolve(wiki.infobox)
    })

const fetch_page = function (title, cb) {
    wtf_wikipedia.from_api(title, lang, function (markup) {
      let text = wtf_wikipedia.plaintext(markup) || '';
      let filename = __dirname + '/corpus/' + title + '.txt';
      fs.writeFileSync(filename, text, 'utf8')
      let mb = (fs.statSync(filename).size || 0) / 1000000.0;
      console.log(title + '  -  ' + mb.toFixed(2) + 'mb');
      cb(null, '');
    });
  };

return new Promise(resolve => {
    if (state.debug) {
      console.log('ActionWikipedia'.bold.yellow, `concept: ${concept}`);
    }

    if (!concept) resolve(state);

    wikipedia.from_api(concept, 'en', (response) => {
      const document = wikipedia.parse(response);
      if (document.type === 'page' && document.categories.length > 0) {
        const summary = document.text.Intro.map(sentence => sentence.text).join(' ');

        state.action = {
          ms: (new Date() - ms),
          engine: 'wikipedia',
          entity: entities.knowledge,
          image: `http://en.wikipedia.org/wiki/${document.images[0]}`,
          title: document.infobox.name ? document.infobox.name.text : concept,
          value: summary,
          related: extract(document.infobox),
        };

        resolve(state);
      }

names.forEach(function(name) {

    WikipediaApi.from_api(name, 'en', function(markup) {
      if(!markup){ console.log(name); return;}
      var id = wikis[name][0];
      var fullName = name;
      var occupation = parseJob(markup);
      var extract = parseExtract(markup);
      var url = 'http://en.wikipedia.org/wiki/' + encodeURIComponent(fullName);

      var update = {
        'id': id,
        'wikipedia': {
          'fullName': fullName,
          'occupation': occupation,
          'extract': extract,
          'url': url
        }
      };

this.onCommand_wiki = function(nick, args) {
		var chan = this.channel;
		if(args.trim() !== "") {
			wikipedia.from_api(args, "en", function(markup){
  				var text = wikipedia.plaintext(markup).substring(0,100) + "...";
				if (text != "...") {
					chan.say(text + " https://en.wikipedia.org/w/index.php?title=" + encodeURIComponent(args));
				} else {
					chan.say("No page found");
				}
			});
		} else {
			chan.say("You're doing it wrong.\nUsage: " + settings.defaultCommandPrefix + "!wiki ");
		}
	};
};