How to extract StatusCode from error, e.g. bedrockruntime.Converse?

[laszukdawid]

This is definitely silly question but I find the whole SDK and "documentation" very difficult to read.

Basically, here's a snippet from my public code

converseOutput, err := bc.client.Converse(ctx, converseInput)
if err != nil {
    return nil, fmt.Errorf("failed to send request: %v", err)
}

I'd like to provide more feedback to users on what the error is and what they could do to mitigate it. For example, if there's 403 then that means checking credentials or permissions. But, I don't understand how to extract that information from the err? Printing out, it looks like aws/transport/http.ErrorResponse but do I need to cast / marshal it into it?

My understanding of the sdk is very limited as... I just can't read/understand it. Seems that there's something called "smithy" that is expected to parse some things. Is this one of those things to parse? In addition to concrete answer on the StatusCode, I'd appreciate any guides on how to read the "documentation" / sdk.