Connect Keycloak users and Send email in our serverless environment

class KeycloakSourceFindUsers {
    async init() {
        // TODO: Create your keycloak credential
        // More info at https://yepcode.io/docs/integrations/keycloak/#credential-configuration
        this.keycloakClient = await yepcode.integration.keycloak(
            "your-keycloak-credential-name"
        );
    }

    async fetch(publish, done) {
        // TODO: Customize your find users payload
        // See possible options at: https://www.keycloak.org/docs-api/18.0/rest-api/#_users_resource
        const users = await this.keycloakClient.users.find({
            email: "yep",
            exact: false, // An example to search users with email containing "yep"
            max: 100,
        });

        // Each user is an object with content following the structure you can find at: 
        // https://www.keycloak.org/docs-api/18.0/rest-api/#_userrepresentation
        for (const user of users) {
            await publish(user);
        }
        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,
        });
    }
}