Code + comment cleanup for the response models

ref #39

src/models/responses/ResponseLogout.ts

@@ -1,11 +1,11 @@
 import { IsString } from 'class-validator';
 
 /**
- * Defines a Logout object
+ * Defines the logout response.
 */
 export class Logout {
   /**
-  * timestamp of logout
+  * The logout's timestamp.
   */
   @IsString()
   timestamp: number;