Imports github.com/aws/aws-sdk-go-v2/internal/rand github.com/aws/aws-sdk-go-v2/internal/sdk github.com/aws/aws-sdk-go-v2/internal/sync/singleflight github.com/aws/smithy-go/logging github.com/aws/smithy-go/middleware github.com/aws/smithy-go/ptr Standard library imports context fmt net/http strings sync/atomic time