Constructs AmazonSecurityTokenServiceClient with AWS Credentials and an
AmazonSecurityTokenServiceClient Configuration object.

C# |
public AmazonSecurityTokenServiceClient( AWSCredentials credentials, AmazonSecurityTokenServiceConfig clientConfig )

- credentials (AWSCredentials)
- AWS Credentials
- clientConfig (AmazonSecurityTokenServiceConfig)
- The AmazonSecurityTokenServiceClient Configuration Object