* fix: CSRF vulnerability

* Use jwtKey (256 bytes random string) as JWT Signature Private Key

* Delete add Add admin's tenant & user when initializing Backend

fix linter

* fix: exposed password in UserModal

* add confirmPassword in UserModal

* use crypto/rand instead of math/rand

* Use http.StatusUnauthorized instead of http.StatusNotFound when CheckAuth failed.

* add InitJwtKey()

Co-authored-by: brianchennn <ny40ny40ny.cs11@nycu.edu.tw>

Co-authored-by: Mahmood <mahmood.gholipour@mail.concordia.ca>

* add err handling on tenant feature

* Handle illegal token

* disable linter on tenantId matching

Co-authored-by: Jesse Tu <ruifan.cs08g@nctu.edu.tw>

* Initial commit for multi-tenant handling.

* Update muiti tenant code.

* Add Tenant UI.

* Tenant/User API routing.

* Update Tenant APIs.

* Update User APIs.

* Tenant related files.

* Update tenant code.

* Update tenant UI.

* Add User related UI.

* Check email duplication.

* Update check for email and token.

* Remove tenant and change email address fix.

* Prevent to add same UI ID subscription of other tenant.

* Update to sync to the latest code.

Co-authored-by: Ian Chen <ychen.cs10@nycu.edu.tw>

Co-authored-by: Tatsuro Matsumoto <tatsuro.matsumoto.ty@apresiasystems.co.jp>

This separates the configuration of WebUI for UDR's. WebUI has now
its own config factory which loads the webuicfg.conf config file.