Help! How edit not fields obscuredInt frida-il2cpp

[laranjo213]

Hello guys, I would like to know if there is a way to edit "public void Exp(ObscuredInt experienceAmout)" experienceAmout as it is not a field and has ObscuredInt

dump fields:

StaticComponents staticComponents; // 0x10
ExperienceRewardController rewardController; // 0x14
ExperienceSaveController saveController; // 0x18   
ExperienceCheatController cheatController; // 0x1c
ExperienceComponents experienceComponents; // 0x20
ExperienceAttributes experienceAttributes; // 0x24
ProtectedInt level; // 0x28
System.Int32 experience; // 0x2c

Code im using with fields copied that post Here:

   const ass = domain.assembly("Assembly-CSharp");
    const image = ass.image;

    const SurvivorInGame = image.class("Survivor.Game.SurvivorInGame");
    const method = SurvivorInGame.method("set_EnemyKillCount");
    const ObscuredInt = SurvivorInGame.field<Il2Cpp.ValueType>(
        "<EnemyKillCount>k__BackingField" //is of type ObscuredInt
    ).value.type.class; //get Class instance of ObscuredInt
    const newValueObj = ObscuredInt.new();
    newValueObj.method(".ctor").invoke(99);

    method.invoke(newValueObj.unbox());