Constructs AmazonSecurityTokenServiceClient with AWS Credentials and an
            AmazonSecurityTokenServiceClient Configuration object.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public AmazonSecurityTokenServiceClient( AWSCredentials credentials, AmazonSecurityTokenServiceConfig clientConfig )
 Parameters
 Parameters- credentials (AWSCredentials)
- AWS Credentials
- clientConfig (AmazonSecurityTokenServiceConfig)
- The AmazonSecurityTokenServiceClient Configuration Object