Nuxt dynamic route sitemap

nuxt_sitemap.sj

const Prismic = require('@prismicio/client');
...

modules: [
    '@nuxtjs/sitemap'
  ],
  sitemap: {
    hostname: process.env.sitemap_host,
    cacheTime: 1000 * 60 * 60 * 2,
    trailingSlash: true,
    gzip: true,
    routes: async () => {
      var routes = [];
      const api = await Prismic.client(process.env.prismicEP)
      await api.query(
        Prismic.predicates.at("document.type", "post_type")
      ).then(function (doc) {
        routes = doc.results.map(p => `/blog/${p.uid}`);
        console.log(routes);
      }).catch(function (err) {
      })
      return routes
    }