add server to monorepo.

packages/server/src/models/Auth.ts

@@ -0,0 +1,38 @@
+
+export default class Auth {
+  /**
+   * Retrieve the authenticated user.
+   */
+  static get user() {
+    return null;
+  }
+
+  /**
+   * Sets the authenticated user.
+   * @param {User} user
+   */
+  static setAuthenticatedUser(user) {
+    this.user = user;
+  }
+
+  /**
+   * Retrieve the authenticated user ID.
+   */
+  static userId() {
+    if (!this.user) {
+      return false;
+    }
+    return this.user.id;
+  }
+
+  /**
+   * Whether the user is logged or not.
+   */
+  static isLogged() {
+    return !!this.user;
+  }
+
+  static loggedOut() {
+    this.user = null;
+  }
+}