title: Error when logging into ECR with Docker login: "Error saving credentials... not implemented"
body: <p>I'm trying to log in to AWS ECR with the Docker login command. I can get a password with the AWS CLI with the command <code>aws ecr get-login-password</code> but when piping this into the <code>docker login</code> command I get the following error:</p>
  <pre><code>Error saving credentials: error storing credentials - err: exit status 1, out: `not implemented`
  </code></pre>
  <p>The command I am running is the one recommended in the AWS ECR documentation:</p>
  <pre><code>aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin account_id_redacted.dkr.ecr.us-east-1.amazonaws.com/blog-project
  </code></pre>
  <p>I'm running the latest version of AWS CLI as of this question, 2.0.57.</p>
  <p>I'm running Docker version 2.4.0 on macOS 10.14.6</p>
  <p>Has anyone else run into this issue, and if so have they found a solution?</p>
  <p>I've definitely achieved this in the past, but I wonder if there is an issue between the latest versions of Docker and the AWS CLI...</p>