Cloud Functionsのデプロイでエラーが発生し解決出来ない

決済にStripeを使いたいのですが
Functionsへデプロイ時にエラー発生して上手く行きません

webのfunctionsのコンソールのログは以下となっています(一部抜粋)

"@type":"type.googleapis.com/google.cloud.audit.AuditLog","status":
{"code":3,"message":"Function failed on loading user code. 
This is likely due to a bug in the user code. Error message: Error: please examine your function logs to see the error cause: 
https://cloud.google.com/functions/docs/monitoring/logging#viewing_logs. 
Additional troubleshooting documentation can be found at 
https://cloud.google.com/functions/docs/troubleshooting#logging. Please visit 
https://cloud.google.com/functions/docs/troubleshooting for in-depth 
troubleshooting documentation."},"authenticationInfo":

Cloud Functions のトラブルシューティング

↑こちらのエラーメッセージ↓の解決策を読みましたが私のレベルでは何をどうすれば解決できるのか分かりませんでした

Cloud Logging のログ:
 「Function to failed on user code.This is likely due to a bug in the user code.」

デプロイしたい関数
index.ts

index.ts
1import * as functions from 'firebase-functions';
2
3const stripe = require('stripe')(functions.config().stripe.token);
4
5// MARK: - Create stripe customer and return customerId to your app
6exports.createStripeCustomer = functions.https.onCall(async (data, context) => {
7    const email = data.email;
8    const customer = await stripe.customers.create({email: email});
9    const customerId = customer.id;
10    return { customerId: customerId }
11});
12
13
14
15// MARK: - Create one time token for stripe
16exports.createStripeEphemeralKeys = functions.https.onCall((data, context) => {
17    const customerId = data.customerId;
18    const stripe_version = data.stripe_version;
19    return stripe.ephemeralKeys
20        .create({
21            customer: customerId,
22            stripe_version: stripe_version
23        })
24});
25
26// MARK: - create Stripe charge
27exports.createStripeCharge = functions.https.onCall((data, context) => {
28    const customer = data.customerId;
29    const source = data.sourceId;
30    const amount = data.amount;
31
32    return stripe.charges.create({
33        customer: customer,
34        source: source,
35        amount: amount,
36        currency: "jpy",
37    })
38});