Step 1: Create Client ID in Apple Developer account.
1. You must have an Apple developer account. Create one at developer.apple.com.
2. Create an App ID
- open section Certificates, Identifiers & Profiles in your Apple Developer account.
- from the left menu, choose Identifiers and click the plus icon to add new identifier.
- click App IDs and click continue
- continue with a form to create an App ID
3. Create a Service ID
- from the left menu, choose Identifiers and click the blue plus icon.
- click ServiceIDs and click continue
- continue with a form to create Service ID
- choose your unique identifier in reverse domain notation. For instance, in our demo, we use com.bubble-plugin-demo. You will need this identifier later to setup the plugin.
3. Enable Sign in with Apple. Setup Domains and Subdomains and Return URLs.
- Domains - add your domain including subdomains where your Bubble app or website will run at
- Return URLs - add the URL of your login page

Step 2: Setup the plugin in Bubble

1. Install the plugin and add element Apple Login Button to your page
2. Set Redirect URL to the page the user sign in
3. Set Service ID Identifier to the Service ID identifier you created in Apple Developer account. In our demo, we set it to 'com.bubble-plugin-demo'.
4. Set other element settings as needed.

Step 3: Configure login workflow in your app:

1. Add the event "Apple Sign In Success" in the workflows
2. Add the actions "Sign the user up" and "Log the user in" to the event
3. In the actions' fields, set the following:
- as Email, set e-mail state
- as Password, set sub state
- as Stay logged in, set 'no'