add getUserObjFromUsername util function,

update all backends to use userObj,
add user backend manager wrapper which calls all linked backends dealing with user data,
list backend handlers for each realm

src/routes/cluster/net.js

@@ -1,7 +1,6 @@
 import { Router } from "express";
 export const router = Router({ mergeParams: true }); ;
 
-const db = global.db;
 const checkAuth = global.utils.checkAuth;
 const approveResources = global.utils.approveResources;
 
@@ -32,9 +31,7 @@ router.post("/:netid/create", async (req, res) => {
 		name: req.body.name
 	};
 
-	const userRealm = req.cookies.username.split("@").at(-1);
-	const userID = req.cookies.username.replace(`@${userRealm}`, "");
-	const userObj = { id: userID, realm: userRealm };
+	const userObj = global.utils.getUserObjFromUsername(req.cookies.username);
 
 	// check auth for specific instance
 	const vmpath = `/nodes/${params.node}/${params.type}/${params.vmid}`;
@@ -65,7 +62,7 @@ router.post("/:netid/create", async (req, res) => {
 		return;
 	}
 	// setup action
-	const nc = db.getUser(userObj).templates.network[params.type];
+	const nc = (await global.userManager.getUser(userObj)).templates.network[params.type];
 	const action = {};
 	if (params.type === "lxc") {
 		action[`net${params.netid}`] = `name=${params.name},bridge=${nc.bridge},ip=${nc.ip},ip6=${nc.ip6},tag=${nc.vlan},type=${nc.type},rate=${params.rate}`;
@@ -104,9 +101,7 @@ router.post("/:netid/modify", async (req, res) => {
 		rate: req.body.rate
 	};
 
-	const userRealm = req.cookies.username.split("@").at(-1);
-	const userID = req.cookies.username.replace(`@${userRealm}`, "");
-	const userObj = { id: userID, realm: userRealm };
+	const userObj = global.utils.getUserObjFromUsername(req.cookies.username);
 
 	// check auth for specific instance
 	const vmpath = `/nodes/${params.node}/${params.type}/${params.vmid}`;