.

modules/notification/notification.controller.js

@@ -248,7 +248,13 @@ const extraControllers = {
                     return Promise.all(getUserDevicesList)
                 }).then(function (userDeviceList) {
                     console.log(userDeviceList);
-                    return new Promise(function(resolve) { resolve(userDeviceList); });
+                    let result = [];
+                    userDeviceList.forEach(function (elements) { 
+                        elements.forEach(function (item) { 
+                            result.push(item) 
+                        }) 
+                    });
+                    return new Promise(function (resolve) { resolve(result); });
                 })
                 .then(disableInvalidUserDevicesPromise)
                 .then(buildMessagesPromise)