public class Login {

    private static final String KEY_USERNAME = "username";
    private static final String KEY_PASSWORD = "password";
    private static final String KEY_DEVICEID = "deviceid";
    private static final String KEY_DEVICENAME = "devicename";
    private static final String KEY_NOTIFICATIONTOKEN = "notificationtoken";

    @SerializedName(KEY_USERNAME)
    private String username;

    @SerializedName(KEY_PASSWORD)
    private String password;

    @SerializedName(KEY_DEVICEID)
    private String deviceid;

    @SerializedName(KEY_DEVICENAME)
    private String devicename;

    @SerializedName(KEY_NOTIFICATIONTOKEN)
    private String notificationtoken;

    public Login() {
    }

    private Login(Builder builder) {
        username = builder.username;
        password = builder.password;
        deviceid = builder.deviceid;
        devicename = builder.devicename;
        notificationtoken = builder.notificationtoken;
    }

    public static Builder newBuilder() {
        return new Builder();
    }

    public static final class Builder {
        private String username;
        private String password;
        private String deviceid;
        private String devicename;
        private String notificationtoken;

        private Builder() {
        }

        public Builder withUsername(String val) {
            username = val;
            return this;
        }

        public Builder withPassword(String val) {
            password = val;
            return this;
        }

        public Builder withDeviceid(String val) {
            deviceid = val;
            return this;
        }

        public Builder withDevicename(String val) {
            devicename = val;
            return this;
        }

        public Builder withNotificationtoken(String val) {
            notificationtoken = val;
            return this;
        }

        public Login build() {
            return new Login(this);
        }
    }

  // getter
}