thirdPartyVPNPeers allows duplicate peer values when I would expect it not to

[zbuchheit]

Prerequisites

• Have you tested the operation in the API directly?
• Do you have the latest Terraform provider version?
• Review the compatibility matrix before opening an issue.

Describe the bug
The thirdPartyVPNPeers resource allows duplicate values. It would be nice to have validation to catch this before duplicate values are sent. This causes subsequent data lookups or refreshes to fail.

Expected behavior
A validation error

Screenshots
Please provide an screenshot of the successful API call with cuRL, Postman, etc.

Debug
Please provide provider debug. This will help us get a clearer picture of the problem you are having, therefore the solution will be more effective.
To enable debug:

export MERAKI_DEBUG=true
export TF_LOG=DEBUG

Environment (please complete the following information):

• Terraform version:
• Meraki provider version:
• OS Version:

Additional context
OpenAPI Issue: meraki/openapi#55
Community Post: https://community.meraki.com/t5/Developers-APIs/Issue-with-duplicate-values-using-organizations-organizationId/m-p/246204?utm_source=communitymembers&utm_medium=email&utm_campaign=immediate_general%27#M11228