Create a client for the Amazon AWSSupport Service with the credentials loaded from the application's default configuration, and if unsuccessful from the Instance Profile service on an EC2 instance. Example App.config with credentials set.

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<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>
        <add key="AWSAccessKey" value="********************"/>
        <add key="AWSSecretKey" value="****************************************"/>
    </appSettings>
</configuration>

public static AmazonAWSSupport CreateAmazonAWSSupportClient()