I'm trying to authorize some Google APIs using the new Google Identity Services JavaScript SDK in my Vue / Quasar / TypeScript app.

According to the documentation, I have loaded the Google 3P Authorization JavaScript library in the header of the index.template.HTML file as follows:

<script src="https://accounts.google.com/gsi/client" onload="console.log('TODO: add onload function')">  
</script>

Now in the Vue component I have this:

<template>
  <v-btn
    class="q-ma-md"
    design="alpha"
    label="Connect Google Calendar"
    @click="handleGoogleCalendarConnect"
  />
</template>

<script setup lang="ts">
import VBtn from 'src/components/VBtn.vue';

const client = google.accounts.oauth2.initCodeClient({ // <-- TypeScript Error Here
  client_id:
    'MY_CLIENT_API_KEY_GOES_HERE',
  scope: 'https://www.googleapis.com/auth/calendar.readonly',
  ux_mode: 'popup',
  callback: (response: any) => {
    const xhr = new XMLHttpRequest();
    xhr.open('POST', code_receiver_uri, true);
    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    // Set custom header for CRSF
    xhr.setRequestHeader('X-Requested-With', 'XmlHttpRequest');
    xhr.onload = function () {
      console.log('Auth code response: ' + xhr.responseText);
    };
    xhr.send('code=' + code);
  },
});

const handleGoogleCalendarConnect = () => {
  client.requestCode();
};
</script>

But I'm getting a TypeScript error on "google" that reads: Cannot find name 'google'. ts(2304)

Maybe it's because I'm missing a type from the Google Identity Services JavaScript SDK? If so, where can I find them?

Or the problem could be something else?