Imports google.golang.org/api/option google.golang.org/api/iamcredentials/v1 github.com/dgrijalva/jwt-go cloud.google.com/go/compute/metadata golang.org/x/oauth2 golang.org/x/oauth2/google golang.org/x/oauth2/jwt Standard library imports os/user bytes context crypto/x509 encoding/json encoding/pem errors flag fmt io io/ioutil log net/http net/url os os/exec path/filepath runtime strings time