Hello, sorry for away from this topic for a week due to my other ad hoc job,
I've already solved this topic, it's not about setting on Fusionauth or google credential.
but it's because I used google's client id on Fusionauth callback and
after you told me to set applicationId in my Fusionauth admin then I used ApplicationId on google oauth's callback.
that's why it kept return me client id is invalid.
it was right under my nose, but I couldn't see it.
Thank you for reply me, that's very helpful, It would take more time if you didn't help me.