unable to login using docker registry on jenkins

I have a Jenkinsfile that I need to login to ECR. this is the relevant section

        script {          docker.withRegistry('https://01234.dkr.ecr.ap-southeast-1.amazonaws.com/', 'awsId'){            def image = docker.image("01234.dkr.ecr.ap-southeast-1.amazonaws.com/tas/master-server:${env.BUILD_ID}")            image.push()          }

But what gets output in the jenkins build is the strange part

$ docker login -u AKIAZWB**********HET -p ******** https://01234.dkr.ecr.ap-southeast-1.amazonaws.com/WARNING! Using --password via the CLI is insecure. Use --password-stdin.Error response from daemon: login attempt to https://01234.dkr.ecr.ap-southeast-1.amazonaws.com/v2/ failed with status: 401 Unauthorized

I remember if one runs aws ecr get-login the -u is AWS, not the access key of the credentials. So where do I get this wrong?