Step 2x: Setup Twitter

First you will have to register your application on Twitter. Check out the documentation for more information: https://developer.twitter.com/en/docs/basics/authentication/overview/oauth.

You must set up a callback url and check "Allow this application to be used to Sign in with Twitter".

Next configure a resource owner of type twitter with appropriate client_id, client_secret.

# config/packages/hwi_oauth.yaml

hwi_oauth:
    resource_owners:
        any_name:
            type:                twitter
            client_id:           <consumer-key>
            client_secret:       <consumer-secret>

When you want to request a user’s email address permission use the optional option [include_email].

Twitter documentation:

https://developer.twitter.com/en/docs/accounts-and-users/manage-account-settings/api-reference/get-account-verify_credentials

# config/packages/hwi_oauth.yaml

hwi_oauth:
    resource_owners:
        any_name:
            type:                twitter
            client_id:           <consumer-key>
            client_secret:       <consumer-secret>
            options:
                include_email: true

When you're done. Continue by configuring the security layer or go back to setup more resource owners.