User authentication
Introduction
The Flutter Plugin allows for user authentication with either a registered authenticator or with a pin. Both cases are based on the same method, however a different value for registeredAuthenticatorId is required.
Getting registered authenticators
To select an registered authenticator which will be used during the authentication process you need to pass its id in the place of registeredAuthenticatorId param. To choose a registered authenticator, first you need to get currently registered authenticators. To get those you need to call the method Onegini.instance.userClient.getRegisteredAuthenticators(context).
var authenticators = await Onegini.instance.userClient.getRegisteredAuthenticators(context)
If there is no registered authenticator, an empty list will be returned.
Authenticate a registered user
Once a user has been registered, it can be logged in using the Onegini.instance.userClient.authenticateUser(BuildContext context, String? registeredAuthenticatorId) method. This method takes the id of a registered authenticator and uses it to authenticate the user. The id param can also be null in which case the default authenticator (PIN) will be used.
var userId = await Onegini.instance.userClient
.authenticateUser(context, registeredAuthenticatorId)
.catchError((error) {
print("Authentication failed: " + error.message);
});
if (userId != null) {
print("Authentication success!");
}
The result of successful authentication is the string value of userId.
