brankoterzicinstana

What about injecting your own STS client config using `withStsClient`, like this: ``` AWSLambdaClientBuilder.standard() .withCredentials(new STSAssumeRoleSessionCredentialsProvider .Builder("some_role_arn", "stslambda") .withStsClient(AWSSecurityTokenServiceClientBuilder.standard() .withRegion("us-west-2") .withClientConfiguration(clientConfiguration) .build()) .build()) .withClientConfiguration(clientConfiguration) .withRegion("us-west-2") .build(); ``` ?