How to set a region with LoadDefaultConfig and shared profile

Hello,

I am starting with Go SDK AWS v2 and I cannot figure out how to select a pre-configured profile and select region programically. I want to do this:

cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithSharedConfigProfile("saml"))

But also this at the same time and I struggle to understand how to combine these two together:

cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion("us-east-1"))

Thanks!