Connect Shopify customers and Send email in our serverless environment

class HttpSourceShopifyGetCustomers {
    async init() {
        // TODO: Create your http credential with Shopify information:
        // More info at https://yepcode.io/docs/integrations/http/#credential-configuration
        // baseUrl: https://your-development-store.myshopify.com/admin/api/2022-04
        // HTTP Headers: { "X-Shopify-Access-Token": <your-access-token> }
        this.httpClient = yepcode.integration.http(
            "your-http-shopify-credential-name"
        );
    }

    async fetch(publish, done) {
        // TODO: Customize your request checking the API documentation:
        // https://shopify.dev/api/admin-rest/2022-04/resources/customer#get-customers
        const {
            data: {
                customers
            },
        } = await this.httpClient.get("customers.json");

        for (const customer of customers) {
            await publish(customer);
        }
        done();
    }

    async close() {}
}

class SmtpTargetSendEmail {
    async init() {
        // TODO: Create your smtp credential
        // More info at https://yepcode.io/docs/integrations/smtp/#credential-configuration
        this.smtp = yepcode.integration.smtp("your-smtp-credential-name");
        this.items = [];
    }

    async consume(item) {
        // we save the items for later
        this.items.push(item);
        // we could send a mail per item here if we want to
    }

    async close() {
        // we want to send a resume mail so we send it at the end
        // TODO: Customize email content
        const text = `Here are the items we got:
    ${this.items.map((item) => ` * ${item.id}: ${item.name}`).join("\n")}`;
        // TODO: Customize email params: from, to and subject
        await this.smtp.sendMail({
            from: "your-email@example.com",
            to: "the-target@example.com",
            subject: `Choose your subject`,
            text,
        });
    }
}