Imports github.com/cenkalti/backoff github.com/go-kit/kit/log github.com/go-kit/kit/log/level github.com/pkg/errors golang.org/x/net/context gopkg.in/natefinch/lumberjack.v2 Standard library imports bytes context crypto/hmac crypto/md5 crypto/sha1 encoding/base64 encoding/json errors fmt io/ioutil net/http net/http/httputil net/url os regexp sort strings sync time