solving bugs reported in GH issues

functions/index.js

@@ -1,12 +1,49 @@
+const admin = require('firebase-admin');
 const functions = require('firebase-functions');
 const puppeteer = require('puppeteer');
 
+admin.initializeApp();
+
 const BASE_URL = 'https://rxresu.me/r/';
 
 function timeout(ms) {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }
 
+async function asyncForEach(array, callback) {
+  for (let index = 0; index < array.length; index++) {
+    // eslint-disable-next-line no-await-in-loop
+    await callback(array[index], index, array);
+  }
+}
+
+exports.deleteUser = functions.https.onCall((_, { auth }) => {
+  if (!auth) {
+    throw new functions.https.HttpsError(
+      'failed-precondition',
+      'The function must be called while authenticated.',
+    );
+  }
+
+  return new Promise((resolve) => {
+    const resumesRef = admin.database().ref('resumes');
+
+    resumesRef.once('value', async (snapshot) => {
+      const data = snapshot.val();
+
+      const resumes = Object.keys(data).filter(
+        (x) => data[x].user === auth.uid,
+      );
+
+      await asyncForEach(resumes, async (id) => {
+        await admin.database().ref(`resumes/${id}`).remove();
+      });
+
+      resolve();
+    });
+  });
+});
+
 exports.printResume = functions.https.onCall(async ({ id, type }, { auth }) => {
   if (!id) {
     throw new functions.https.HttpsError(