Step 1: Setup Slack as OAuth Provider

• First of all, go to https://api.slack.com/apps and log into your Slack account.
• You will be presented with following screen. Click on Create new App.

• You will be shown a form where you have to enter Application Name and Development Slack Workspace. Fill the form with appropriate information and click on Create App.

• After creating the slack application, you will be brought to Application Management page. Scroll down to “App Credentials” section. Here you will find given Client ID and Client Secret for your slack application.

• Copy these credentials in MO OAuth Plugin configuration on corresponding fields.
• Go to OAuth & Permissions

• Add Redirect URL: In slack application's Redirect URLs section, Click on Add New Redirect URL and enter the same from the MO OAuth Client. Click on Save URLs.

• Scope: Go to OAuth & Permissions, select scope from Select Permission Scopes dropdown list and Save Changes. Identity basic is required scope.

• Then, scroll Down to Scopes section and add necessary scopes like so and then click on Save Changes.
  Most importantly, these scopes must be same on the MO OAuth Application Configuration page.


You have successfully completed your Slack App configurations.





Slack Endpoints and Scope:




Client ID :	Click Here
Client Secret :	Click Here
Scope:	users.profile:read
Authorize Endpoint:	https://slack.com/oauth/authorize
Access Token Endpoint:	https://slack.com/api/oauth.access
Get User Info Endpoint:	https://slack.com/api/users.profile.get

You have successfully configured Slack as OAuth Provider for achieving Slack login into your WordPress Site.

Step 2: Setup WordPress as OAuth Client

• Go to Configure OAuth tab and configure App Name, Client ID, Client Secret from provided Endpoints.
• openid is already filled but if it doesn't work then configure scope as User.Read and for fetching group info use scope is Directory.read.all.
• Click on Save Settings to save the configuration.

Step 3: User Attribute Mapping.

• User Attribute Mapping is mandatory for enabling users to successfully login into WordPress. We will be setting up user profile attributes for WordPress using below settings.

Finding user attributes

• Go to Configure OAuth tab. Scroll down and click on Test Configuration.

• You will see all the values returned by your OAuth Provider to WordPress in a table. If you don't see value for First Name, Last Name, Email or Username, make the required settings in your OAuth Provider to return this information.

• Once you see all the values in Test Configuration, go to Attribute / Role Mapping tab, you will get the list of attributes in a Username dropdown.


You have successfully configured WordPress as OAuth Client for achieving Slack login into your WordPress Site.

Step 4: Login Settings / Sign In Settings.

• The settings in Single Sign-On (SSO) Settings tab define the user experience for Single Sign-On (SSO). To add a Slack login widget on your WordPress page, you need to follow the below steps.

1. Sign in settings for wordpress 5.7 and before :

• Go to WordPress Left Panel > Appearances > Widgets.
• Select miniOrange OAuth. Drag and drop to your favourite location and save.


2. Sign in settings for wordpress 5.8 :

• Go to WordPress Left Panel > Appearances > Widgets.
• Select miniOrange OAuth. Drag and drop to your favourite location and save.

• Open your WordPress page and you can see the Slack SSO login button there. You can test the Slack Single Sign-On (SSO) now.

Additional Resources

• What is OAuth 2.0?
• OAuth for Sign in with Slack
• Frequently Asked Questions (FAQs)