I want to run a container from app engine code. The Google doc link gives command line options to do this. Is there a way of doing this programmatically?

Edit: I enabled verbose logs on the command given in the above link, to run a container from gcloud shell, to see the REST API that it accesses.

kubectl run hello-node --image=gcr.io/google-samples/node-hello:1.0 --port=8080

Then I obtained the IP and credentials (username and password) of the master node from the cloud console and used it to access the REST API with basic authentication from ARC. But I get a 403 response with the following error

The access to the URL 35.188.149.76 is restricted because the validation of the certificate failed

Is this the correct way of programmatically accessing the container engine?