Login working and prepare LoginResponse class and associated types

lib/structs/UUID.ts

@@ -0,0 +1,34 @@
+import * as validator from 'validator';
+
+export class UUID
+{
+    private mUUID = '00000000-0000-0000-0000-000000000000';
+
+    static zero(): UUID
+    {
+        return new UUID();
+    }
+
+    constructor(val?: string)
+    {
+        if (val !== undefined)
+        {
+            this.setUUID(val);
+        }
+    }
+
+    public setUUID(val: string): boolean
+    {
+        if (validator.isUUID(val, 4))
+        {
+            this.mUUID = val;
+            return true;
+        }
+        return false;
+    }
+
+    public toString = (): string =>
+    {
+        return this.mUUID;
+    }
+}