register method
Implementation
Future<PartialIdentityConfig> register(String username, String password, String token, String email, String firstName, String lastName, int emailEACPExpiry) async {
final dynamic json = await _channel.invokeMethod('registerIdentity',
{"username": username,
"password": password,
"token": token,
"email": email,
"first_name": firstName,
"last_name": lastName,
"email_eacp_expiry": emailEACPExpiry.toString(),
"realm_config": this.config.toJson()
});
return PartialIdentityConfig.fromValidJsonString(json);
}