CLeanup the User and Password checking

Added a Method in ConfigFile

router.go

@@ -8,7 +8,6 @@ import (
 	_ "expvar"
 	"net/http"
 	"os"
-	"strings"
 
 	"github.com/goji/httpauth"
 	"github.com/gorilla/handlers"
@@ -21,8 +20,8 @@ func NewRouter() *mux.Router {
 	router := mux.NewRouter().StrictSlash(true)
 
 	if Conf.Expvar {
-		if len(strings.TrimSpace(Conf.User)) == 0 || len(strings.TrimSpace(Conf.Password)) == 0 {
-			panic("Your are exporting debug variables and you are not defining an User and a Password")
+		if !Conf.WasProvidedUserAndPassword() {
+			panic("Your are exporting debug variables and looks like you forget to define an User and a Password")
 		}
 
 		router.Handle("/debug/vars", httpauth.SimpleBasicAuth(Conf.User, Conf.Password)(http.DefaultServeMux))