We use AWS Amplify command line to update the Amazon Cognito configuration on the backend and add support for Sign In with Apple.
There are four values to be collected from previous step. Be sure you have it all in a text editor before starting this section
In a terminal, type:
cd $PROJECT_DIRECTORY amplify update auth
What do you want to do? Choose Update OAuth social providers and press enter
Select the identity providers you want to configure for your user pool: Use the arrow keys to highlight Sign in with Apple and press space, then press enter.
Enter your Services ID for your OAuth flow. Type your Service ID and press enter (in my example
Enter your Team ID for your OAuth flow: Type your Team ID and press enter (in my example
Enter your Key ID for your OAuth flow: Type your Key ID and press enter (in my example
Enter your Private Key for your OAuth flow: Type your private key as a one-line PEM format (in my example
-----BEGIN PRIVATE KEY-----MIG (redacted) y6P-----END PRIVATE KEY-----)
amplify creates the required resources to deploy the Sign in with Apple configuration in the cloud.
In a Terminal, assuming you are still in your project directory, type:
Amplify updates the backend infrastructure, it adds the federation configuration to Amazon Cognito. After a while, you should see the familiar message :
That’s it ! There is no change required in the code. The federation happens between Cognito and Apple on the server side. We can start our app and start to test immediately.