Imports golang.org/x/net/context google.golang.org/api/transport google.golang.org/api/googleapi github.com/googleapis/gax-go google.golang.org/api/iterator cloud.google.com/go/internal/optional google.golang.org/api/option google.golang.org/api/storage/v1 Standard library imports bytes crypto/rand crypto/x509 encoding/base64 errors fmt io io/ioutil net/http net/url reflect strconv strings time unicode/utf8 crypto/rsa crypto/sha256 encoding/pem crypto