You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: resolve.go
    path of file: ./repos/buildkit/vendor/github.com/aws/aws-sdk-go-v2/config
    
    the code of the file until where you have to start completion: package config

import (
	"context"
	"crypto/tls"
	"crypto/x509"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"

	"github.com/aws/aws-sdk-go-v2/aws"
	awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
	"github.com/aws/aws-sdk-go-v2/feature/ec2/imds"
	"github.com/aws/smithy-go/logging"
)

// resolveDefaultAWSCo
    
func resolveRegion(ctx context.Context, cfg *aws.Config, configs configs) error {
	v, found, err := getRegion(ctx, configs)
	if err != nil {
		// TODO error handling, What is the best way to handle this?
		// capture previous errors continue. error out if all errors
		return err
	}
	if !found {
		return nil
	}

	cfg.Region = v
	return nil
}