feat: Mention users, get user number from Contact model

src/structures/Contact.js

@@ -20,6 +20,12 @@ class Contact extends Base {
          */
         this.id = data.id;
 
+        /**
+         * Contact's phone number
+         * @type {string}
+         */
+        this.number = data.userid;
+
         /**
          * Indicates if the contact is a business contact
          * @type {boolean}