Implementing Login/Logout

• It's important to set the User Attribute Unique ID when a user logs into your app.
• This is to merge the new user with the existing user, if any exists, and will help prevent creation of unnecessary/stale users.
• Setting the Unique ID is a critical piece to tie a user across devices and installs/uninstalls as well across all platforms (i.e. iOS, Android, Windows, The Web). Set the USER_ATTRIBUTE_UNIQUE_ID attribute as soon as the user is logged in. Unique ID can be something like an email ID, a username (unique), or a database ID or any Backend generated ID.
• Do not set this for the user who not logged in.

Login

import 'package:moengage_flutter/moengage_flutter.dart';
final MoEngageFlutter _moengagePlugin = MoEngageFlutter(YOUR_APP_ID);
_moengagePlugin.initialise();
_moengagePlugin.setUniqueId("Unique ID");

Note: The following values are not allowed in the UniqueID field: "unknown", "guest", "null", "0", "1", "true", "false", "user_attribute_unique_id", "(empty)", "na", "n/a", "", "dummy_seller_code", "user_id", "id", "customer_id", "uid", "userid", "none", "-2", "-1", "2"

Logout

The application needs to notify the MoEngage SDK whenever the user is logged out of the application. To notify the SDK, call the API whenever the user is logged out of the application.

import 'package:moengage_flutter/moengage_flutter.dart';
final MoEngageFlutter _moengagePlugin = MoEngageFlutter(YOUR_WORKSPACE_ID);
_moengagePlugin.initialise();
_moengagePlugin.logout();

Updating User Attribute Unique Id

Use the method setAlias() to update the user attribute unique id instead of setUniqueId() with a different value. Using the method setUniqueId() with a new value creates unintended users in MoEngage.

import 'package:moengage_flutter/moengage_flutter.dart';
final MoEngageFlutter _moengagePlugin = MoEngageFlutter(YOUR_WORKSPACE_ID);
_moengagePlugin.initialise();
_moengagePlugin.setAlias("Updated Unique ID");