I'm using a simple ballerina code to build my program (simple hello world) with ballerinax/kubernetes annotations. The service is being compiled succesfully and accessible via the specific bind port from local host.

When configuration a kubernetes deployment I'm specifying the image build and push flags:

@kubernetes:Deployment {
    replicas: 2,
    name: "hello-deployment",
    image: "gcr.io/<gct-project-name>/hello-ballerina:0.0.2",
    imagePullPolicy: "always",
    buildImage: true,
    push: true
}

When building the source code:

ballerina build hello.bal

This is what I'm getting:

Compiling source
    hello.bal

Generating executable
    ./target/hello.balx
    @docker          - complete 3/3

    Run following command to start docker container:
    docker run -d -p 9090:9090 gcr.io/<gcr-project-name>/hello-ballerina:0.0.2

    @kubernetes:Service              - complete 1/1
    @kubernetes:Deployment           - complete 1/1
error [k8s plugin]: Unable to push docker image: unauthorized: You don't have the needed permissions to perform this operation, and you may have invalid credentials. To authenticate your request, follow the steps in: https://cloud.google.com/container-registry/docs/advanced-authentication

Note that when pushing it manually via docker on my local machine it works find and the new image is getting pushed.

What am I missing? Is there a way to tell ballerina about docker registry credentials via the kubernetes package?