I’m developing an iOS app and need to make secure API requests to AWS services using the AWS SDK for Swift. I understand that AWSSigV4Signer is used for signing requests but am unsure of the correct steps to integrate it. Could anyone guide me on the following:

Setting up SdkHttpRequestBuilder: What are the essentials for initializing this with the URL, headers, and body?
Using AWSSigV4Signer: How do I pass AWS credentials to AWSSigV4Signer and apply it to sign the request?
Sending the Request: What’s the procedure to send the signed request using URLSession?

Here’s the basic setup I am working with:

let requestBuilder = SdkHttpRequestBuilder()
    .with(url: URL(string: "https://yourapi.aws.com/endpoint")!)
    .with(method: .post)
    .with(headers: ["Content-Type": "application/json"])
    .with(body: "{"key":"value"}".data(using: .utf8))

// Credentials - How do I use these with AWSSigV4Signer?
let credentials = AWSCredentials(accessKeyId: "ACCESS_KEY", secretAccessKey: "SECRET_KEY")

I’d appreciate any detailed guidance or examples on utilizing AWSSigV4Signer effectively.