Constructs a RefreshingSessionAWSCredentials object.
            AmazonSecurityTokenService is created from passed-in credentials and
            config object and is used to refresh credentials.
            
            Passed-in AWSCredentials cannot be session credentials.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public RefreshingSessionAWSCredentials( AWSCredentials stsCredentials, AmazonSecurityTokenServiceConfig stsConfig )
 Parameters
 Parameters- stsCredentials (AWSCredentials)
- stsConfig (AmazonSecurityTokenServiceConfig)
- Config object used for the constructed AmazonSecurityTokenService.