toJson method
Implementation
Map<String, dynamic> toJson() {
final map = <String, dynamic>{};
map['app_id'] = appId;
map['first_name'] = firstName;
map['last_name'] = lastName;
map['email'] = email;
map['phone_number'] = phoneNumber;
map['card_type'] = cardType;
map['card_brand'] = cardBrand;
map['card'] = card;
map['device_id'] = deviceId;
if (device != null) {
map['device'] = device?.toJson();
}
return map;
}