Response

package generated_program;
import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.aws.apigateway.RestApi;
import com.pulumi.aws.apigateway.Response;
import com.pulumi.aws.apigateway.ResponseArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }
    public static void stack(Context ctx) {
        var main = new RestApi("main");
        var test = new Response("test", ResponseArgs.builder()
            .restApiId(main.id())
            .statusCode("401")
            .responseType("UNAUTHORIZED")
            .responseTemplates(Map.of("application/json", "{\"message\":$context.error.messageString}"))
            .responseParameters(Map.of("gatewayresponse.header.Authorization", "'Basic'"))
            .build());
    }
}

$ pulumi import aws:apigateway/response:Response example 12345abcde/UNAUTHORIZED