Stage variables are environment variables that can be used to change the behavior at runtime of the API Gateway methods for each deployment stage. The following section will illustrate how to use stage variables with API Gateway.
On the API Gateway Console, navigate to the Movies API, click on the GET method, and update the target Lambda Function to use a stage variable instead of a hardcoded Lambda function name, as shown in the following screenshot:
When you save it, a new prompt will ask you to grant the permissions to API Gateway to call your Lambda function aliases, as shown in the following screenshot:
Execute the following ...
