I've been trying to use this plugin to push a simple image to my ECR registry with no success. I've verified my credentials numerous times and tried everything I could think of. 

 
node {

  stage 'Build Image'
  def app_name = readFile('app_name')   
  def app_version = readFile('app_version')   
  def app_revision = readFile('app_revision')
  docker.build("${app_name}")

  stage 'Push Image'
  docker.withRegistry('https://400585646753.dkr.ecr.us-west-2.amazonaws.com', 'ecr:us-east-2:test-creds') {
    docker.image("${app_name}").push("${app_version}_${app_revision}")
  }
}

This always fails with:

+ docker push 400585646753.dkr.ecr.us-west-2.amazonaws.com/test_app:v1.0_1.0
The push refers to a repository [400585646753.dkr.ecr.us-west-2.amazonaws.com/test_app]
08c2295a7fa5: Preparing
denied: Your Authorization Token is invalid.

I've tried enabling the ALL level on the com.cloudbees.jenkins.plugins.amazonecr logger in order to make sure it's using the right ACCESS_KEY and SECRET_KEY however, for some reason the logger never reaches the inside of this if statment. This is very strange since in the logs I can see this stack trace which has the same if statement expression. I'm also positive it reaches that far down the code because I see the "Success" output printed here. I've attached the log to this thread. 

Any help would greatly appreciated.