Imports github.com/aws/aws-sdk-go-v2/aws github.com/aws/aws-sdk-go-v2/aws/signer/v4 github.com/aws/aws-sdk-go-v2/internal/awsutil github.com/aws/aws-sdk-go-v2/private/protocol github.com/aws/aws-sdk-go-v2/private/protocol/jsonrpc Standard library imports fmt time