Unable to use user defined types due to Convert.ChangeType

[Nairda015]

Describe the bug

Current implementation of [FromHeaders] limits supported types to primitives like string/int

Expected Behavior

Correct values are passed from generated code to function

Current Behavior

It throws when I want to use Guid or other types with implicit cast from string or custom parser (IParsable)

Reproduction Steps

Add Guid as param with FromHeaderAttribute

Possible Solution

Enable using IParsable or casting from string

Additional Information/Context

No response

AWS .NET SDK and/or Package version used

Amazon.Lambda.Annotations 1.2.0

Targeted .NET Platform

.NET 8

Operating System and version

Windows 10

[ashishdhingra]

Discussed with the team. This is a new feature to implement support for custom types. However, in interim, we should throw proper exception during source generation.

[Nairda015]

Do you need more hands in AWS to work on new features for this project? :D