# Get registry info (creds and endpoint).
    def getRegistryInfo(rid):
        creds = ecr.get_credentials(registry_id=rid)
        decoded = base64.b64decode(creds.authorization_token).decode()
        parts = decoded.split(':')
        if len(parts) != 2:
            raise Exception("Invalid credentials")
        return ImageRegistry(creds.proxy_endpoint, parts[0], parts[1])

my_image = Image(
            self.name,
            image_name=pulumi.Output.concat(repo.repository_url, "/", custom_image, ":v1.0.0"),
            build=f'./docker/{custom_image}', #=DockerBuild(context=f'./docker/{custom_image}'),
            registry=ECRRepo.getRegistryInfo(repo.registry_id)
        )

ecr.Repository

Exception: invoke of aws:ecr/getCredentials:getCredentials failed: Missing required argument: The argument "registry_id" is required, but no definition was found. ()

ECRRepo

registry=repo.registry_id.apply(getRegistryInfo)

getRegistryInfo