I have a CodeArtifact repository in a central AWS account with company-wide shared libraries. I want to create a CodeArtifact repository in my AWS account that has my team's libraries but the central repository as an upstream repository.

When using CloudFormation to create our respository I tried

  ProjectRepository:
    Type: "AWS::CodeArtifact::Repository"
    Properties:
      RepositoryName: "projectrepo"
      DomainName: !GetAtt ProjectDomain.DomainName
      Upstreams:
        - arn:aws:codeartifact:us-east-1:111111111111:repository/centraldomain/centralrepo

but that wasn't right.