Clone authURL.

jwt.go

@@ -43,9 +43,8 @@ type JWTOptions struct {
 // NewJWTConfig creates a new configuration with the specified options
 // and OAuth2 provider endpoint.
 func NewJWTConfig(opts *JWTOptions, aud string) (*JWTConfig, error) {
-	var audURL *url.URL
-	var err error
-	if audURL, err = url.Parse(aud); err != nil {
+	audURL, err := url.Parse(aud)
+	if err != nil {
 		return nil, err
 	}
 	contents, err := ioutil.ReadFile(opts.PemFilename)