Allow multiple secrets for RDS Proxy

[cisnerosk]

Current Terraform Version

0.13.3

I did take a quick look at the Changelog for newer versions, and I didn't see where this is implemented in newer versions yet.

Use-cases

In the console you can add many secrets to the RDS proxy. Additionally the AWS CDK supports this, while trying to do this with Terraform it fails. It seems as though auth.secrets_arn can't take an array of values.

Attempted Solutions

N/A

Proposal

I'm not sure of how to fix this, although I suspect this block needs to be changed to support sets of hashes. I'm not familiar with Go, so this may be the wrong starting point.

References

aws/aws-cdk#9098

[ghost]

This issue has been automatically migrated to hashicorp/terraform-provider-aws#17713 because it looks like an issue with that provider. If you believe this is not an issue with the provider, please reply to hashicorp/terraform-provider-aws#17713.

[ghost]

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