Update atlas-basic.ts (#74)

Co-authored-by: Andrea Angiolillo <[email protected]>

Author: Zuhairahmed

examples/l3-resources/atlas-basic.ts

@@ -63,6 +63,9 @@ export class CdkTestingStack extends cdk.Stack {
     const clusterName = this.node.tryGetContext('clusterName') ?? 'test-cluster';
     const region = this.node.tryGetContext('region') ?? "US_EAST_1";
     const ip = this.node.tryGetContext('ip');
+    if (!ip){
+      throw "No context value specified for ip. Please specify via the cdk context."
+    }
 
     return {
       orgId,