Need to create ECR and to push image using CDK

Hello, I have the following shell script:

...
#
# Get a temporary access password to the AWS ECR (Elastic Container Registry) service
#
aws ecr get-login-password > login-password.txt
#
# Login to the AWS ECR service as generic AWS user
#
docker login -u AWS --password-stdin <login-password.txt https://${ACCOUNT_NUMBER}.dkr.ecr.eu-west-3.amazonaws.com
#
# Create the registry
#
REPO_URI=$(aws ecr create-repository --repository-name $REPO_NAME --output text --query "repository.repositoryUri")
#
# Tag the image
#
docker tag undertow $REPO_URI
#
# Push it
#
#docker push $REPO_URI
...

I need to implement the same using CDK, in Java. I know how to create repositories, etc. but what I don't know and not able to find anywhere is how to get the temporary access password and how to login to ECR, as shown above. Where could I find the missing know how ?

Many thanks in advance foe any help and support.

Nicolas