Security added on delete service and list all node + cleaning some code

backend/handlers/login_handler.go

@@ -0,0 +1,12 @@
+package handlers
+
+import (
+	"log"
+
+	"github.com/gin-gonic/gin"
+)
+
+func (r *NodeHandler) LoginHandler(c *gin.Context) {
+	log.Println("trying to login")
+	r.Repo.LoginHandler(c)
+}