How can I authenticate using IAM for local development of .NET application?

Question

I am a federated user that has the security policy that any token generated lasts a maximum of 60 minutes. This makes generating access keys for AWS SDK no possible. I am creating a .NET application which access S3 buckets. If I run the program on a EC2 instance that has proper IAM access to the bucket, the program runs with no issues. Is there a plug or way to authenticate via IAM the script when working on my local machine? This would reduce headaches of spinning up a dev environment on a instnace.

Answer

When you use the .NET AWS SDK it picks up the credentials on your computer. The SDK looks for a profile named "default". 
Take a look in your  in `~/.aws/credentials`, or `%USERPROFILE%\.aws\credentials`

If that is missing (or possibly named something else) you will have tell you S3 Client which credentials to use.

https://docs.aws.amazon.com/sdk-for-net/v3/developer-guide/creds-file.html

How can I authenticate using IAM for local development of .NET application?

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