toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> result = <String, dynamic>{};
result['user_id'] = userId;
result['user_token'] = userToken;
result['expiry'] = expiry;
result['email'] = email;
result['username'] = username;
result['first_name'] = firstName;
result['last_name'] = lastName;
result['avatar'] = avatar;
result['created_at'] = createdAt;
return result;
}