Function get_aws_sigv4 

pub fn get_aws_sigv4(
    url: impl Into<String>,
    headers: impl IntoIterator<Item = (String, String)>,
    aws_credentials: Credentials,
    region: impl Into<String>,
    service: impl Into<String>,
) -> Result<Response, HttpGetError>

HTTP GET with AWS SigV4 signing provided by the host

use momento_functions_host::build_environment_aws_credentials;

http::get_aws_sigv4(
    "https://bedrock-runtime.us-west-2.amazonaws.com/model/us.amazon.nova-pro-v1:0/invoke",
    [],
    build_environment_aws_credentials!(),
    "us-west-2",
    "bedrock",
)?;
http::get_aws_sigv4(
    "https://bedrock-runtime.us-west-2.amazonaws.com/model/us.amazon.nova-pro-v1:0/invoke",
    [
        ("other_header".to_string(), "abc123".to_string()),
    ],
    build_environment_aws_credentials!(),
    "us-west-2",
    "bedrock",
)?;