Change User model to class

src/app/shared/models/user.model.ts

@@ -1,10 +1,11 @@
-export interface User {
+export class User {
-    default_board_id: number;
+    constructor(public default_board_id: number = 0,
-    email: string;
+            public email: string = '',
-    id: number;
+            public id: number = 0,
-    last_login: Date;
+            public last_login: Date = null,
-    security_level: number;
+            public security_level: number = 3,
-    user_option_id: number;
+            public user_option_id: number = 0,
-    username: string;
+            public username: string = '') {
+    }
 }