Added AccessToken created property

lib/models/access-token.js

@@ -15,7 +15,8 @@ var Model = require('../loopback').Model
 var properties = {
   id: {type: String, generated: true, id: 1},
   uid: {type: String},
-  ttl: {type: Number, ttl: true}
+  ttl: {type: Number, ttl: true}, // time to live in seconds
+  created: {type: Date}
 };
 
 /**
@@ -52,6 +53,7 @@ AccessToken.beforeCreate = function (next, data) {
       next(err);
     } else {
       data.id = id;
+
       next();
     }
   });

lib/models/role.js

@@ -15,4 +15,4 @@ module.exports = function(dataSource) {
     dataSource = dataSource || new require('loopback-datasource-juggler').ModelBuilder();
     var Role = dataSource.define('Role', RoleSchema);
     return Role;
-}
+}