For our new friends:

Logto is an Auth0 alternative designed for modern apps and SaaS products. It offers both Cloud and Open-source services to help you quickly launch your identity and management (IAM) system. Enjoy authentication, authorization, and multi-tenant management all in one.

We recommend starting with a free development tenant on Logto Cloud. This allows you to explore all the features easily.

In this article, we will go through the steps to quickly build the Slack sign-in experience (user authentication) with WordPress plugin and Logto.

Prerequisites

• A running Logto instance. Check out the introduction page to get started.
• Basic knowledge of WordPress plugin.
• A usable Slack account.

Create an application in Logto

Logto is based on OpenID Connect (OIDC) authentication and OAuth 2.0 authorization. It supports federated identity management across multiple applications, commonly called Single Sign-On (SSO).

To create your Traditional web application, simply follow these steps:

1. Open the Logto Console. In the "Get started" section, click the "View all" link to open the application frameworks list. Alternatively, you can navigate to Logto Console > Applications, and click the "Create application" button.
2. In the opening modal, click the "Traditional web" section or filter all the available "Traditional web" frameworks using the quick filter checkboxes on the left. Click the "WordPress" framework card to start creating your application.
3. Enter the application name, e.g., "Bookstore," and click "Create application".

🎉 Ta-da! You just created your first application in Logto. You'll see a congrats page which includes a detailed integration guide. Follow the guide to see what the experience will be in your application.

Integrate WordPress with Logto

Install the plugin

info:

At the moment, our plugin is still under review and not available in the WordPress plugin directory. We'll update this page once it's available.

From upload

1. Download the Logto WordPress plugin from one of the following links:
   • Latest release: Download the file which name in the format of logto-plugin-<version>.zip.
2. Download the plugin ZIP file.
3. Go to Plugins > Add New in your WordPress admin panel.
4. Click Upload Plugin.
5. Select the downloaded ZIP file and click Install Now.
6. Click Activate.

Configure the plugin

Now you should be able to see the Logto menu in your WordPress admin panel sidebar. Click Logto > Settings to configure the plugin.

note:

You should have a traditional web application created in Logto Console before configuring the plugin. If you haven't created one, please refer to Integrate Logto into your application for more information.

The minimum configuration to get started for the plugin is:

• Logto endpoint: The endpoint of your Logto tenant.
• App ID: The app ID of your Logto application.
• App secret: One of the valid app secrets of your Logto application.

All values can be found on the application details page in Logto Console.

After filling in the values, click Save Changes (scroll down to the bottom of the page if you can't find the button).

Configure redirect URI

The redirect URI is the URL to which Logto will redirect users after they have authenticated; and the post sign-out redirect URI is the URL to which Logto will redirect users after they have logged out.

Here's a non-normative sequence diagram to illustrate the sign-in flow:

Here's how the sign-out flow looks like in a non-normative sequence diagram:

To learn more about why redirect is needed, see Sign-in experience explained.

In our case, we need to configure both redirect URIs in your Logto Console. To find the redirect URI, go to the Logto > Settings page in your WordPress admin panel. You'll see the Redirect URI and Post sign-out redirect URI fields.

1. Copy the Redirect URI and Post sign-out redirect URI values and paste them into the Redirect URIs and Post sign-out redirect URIs fields in your Logto Console.
2. Click Save changes in Logto Console.

Checkpoint: Test your WordPress website

Now you can test your Logto integration in your WordPress website:

1. Open an incognito browser window if needed.
2. Visit your WordPress website and click the Log in link if applicable; or directly visit the login page (e.g., https://example.com/wp-login.php).
3. The page should redirect you to the Logto sign-in page.
4. Complete the sign-in or sign-up process.
5. After successful authentication, you should be redirected back to your WordPress website and logged in automatically.
6. Click the Log out link to log out of your WordPress website.
7. You should be redirected to the Logto sign-out page, then back to your WordPress website.
8. You should be logged out of your WordPress website.

To learn more about the WordPress plugin settings, see WordPress quick start.

Add Slack connector

To enable quick sign-in and improve user conversion, connect with WordPress as an identity provider. The Logto social connector helps you establish this connection in minutes by allowing several parameter inputs.

To add a social connector, simply follow these steps:

1. Navigate to Console > Connectors > Social Connectors.
2. Click "Add social connector" and select "Slack".
3. Follow the README guide and complete required fields and customize settings.

note:

If you are following the in-place Connector guide, you can skip the next section.

Set up Slack OAuth app

Set up Slack App

Go to the Slack API: Applications and sign in with your Slack account. If you don’t have an account, you can register for one.

Then, create an app.

Step 1: Find Client ID and Client Secret.

You can find the Client ID and Client Secret on the "Basic Information" section.

Step 2: Set up redirect URLs.

Go to the "OAuth & Permissions" section, you can find the "Redirect URLs" form.

In our case, this will be ${your_logto_endpoint}/callback/${connector_id}. e.g. https://foo.logto.app/callback/${connector_id}. The connector_id can be found on the top bar of the Logto Admin Console connector details page.

You can refer to the Slack API documentation for more details.

Configure your connector

In your Logto connector configuration, fill out the following fields with the values obtained from your App's "Keys and tokens" page's "OAuth 2.0 Client ID and Client Secret" section:

• clientId: Your App's Client ID.
• clientSecret: Your App's Client Secret.

scope is a space-delimited list of OpenID scopes. If not provided, the default scope is openid profile.

Config types

Name	Type
clientId	string
clientSecret	string
scope	string

Save your configuration

Double check you have filled out necessary values in the Logto connector configuration area. Click "Save and Done" (or "Save changes") and the Slack connector should be available now.

Enable Slack connector in Sign-in Experience

Once you create a social connector successfully, you can enable it as a "Continue with Slack" button in Sign-in Experience.

1. Navigate to Console > Sign-in experience > Sign-up and sign-in.
2. (Optional) Choose "Not applicable" for sign-up identifier if you need social login only.
3. Add configured Slack connector to the "Social sign-in" section.

Testing and Validation

Return to your WordPress plugin app. You should now be able to sign in with Slack. Enjoy!

Further readings

End-user flows: Logto provides a out-of-the-box authentication flows including MFA and enterprise SSO, along with powerful APIs for flexible implementation of account settings, security verification, and multi-tenant experience.

Authorization: Authorization defines the actions a user can do or resources they can access after being authenticated. Explore how to protect your API for native and single-page applications and implement Role-based Access Control (RBAC).

Organizations: Particularly effective in multi-tenant SaaS and B2B apps, the organization feature enable tenant creation, member management, organization-level RBAC, and just-in-time-provisioning.

Customer IAM series Our serial blog posts about Customer (or Consumer) Identity and Access Management, from 101 to advanced topics and beyond.