Description:

I am trying to use the GetAtt intrinsic function to retrieve the UserPoolId and ClientId from a UserPoolClient and UserPool resource respectively.

Debug output shows

Unable to resolve property UserPoolId: OrderedDict([('Fn::GetAtt', ['UserPool', 'UserPoolId'])]). Leaving as is.        

Is this a supported feature currently or an area where Intrinsic Function support is limited?

If the latter, it would be great to document these limitations somewhere (unless I have missed them!)

Steps to reproduce:

Run sam local invoke my_func where some properties in template.yaml rely on Fn::GetAtt.

Observed result:

Expected result:

!GetAtt should return the specified attribute for the given resource.

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: Linux
2. sam --version: SAM CLI, version 1.113.0
3. AWS region: us-east-2

# Paste the output of `sam --info` here
{
  "version": "1.113.0",
  "system": {
    "python": "3.11.8",
    "os": "Linux-6.8.1-arch1-1-x86_64-with-glibc2.39"
  },
  "additional_dependencies": {
    "docker_engine": "25.0.4",
    "aws_cdk": "Not available",
    "terraform": "Not available"
  },
  "available_beta_feature_env_vars": [
    "SAM_CLI_BETA_FEATURES",
    "SAM_CLI_BETA_BUILD_PERFORMANCE",
    "SAM_CLI_BETA_TERRAFORM_SUPPORT",
    "SAM_CLI_BETA_RUST_CARGO_LAMBDA"
  ]
}

Add --debug flag to command you are running