Add auth

pkg/version/version.go

@@ -1,10 +1,16 @@
 package version
 
+import "fmt"
+
 type Info struct {
 	Version string `json:"version"`
 	Channel string `json:"channel"`
 }
 
+func (i Info) String() string {
+	return fmt.Sprintf("%s-%s", i.Version, i.Channel)
+}
+
 var (
 	Version = ""
 	Channel = ""