Team

I am developing chat mobile app (React Native) and using firebase cloud messaging for this purpose.
Wanna to use HTTP v1 API, not Legacy because Legacy API will stopped by June this year.
If I use HTTP v1 API, I have to use oAuth 2.0 access token, right?

But oAuth Playground provides only temp access toke, not temporary token.
So if it expired, I have to regenerate the access token.

How can solve this issuse on my end?

Thank you.
Best regards.

I tried to config my own OAuth Crednetial in the config panel of OAuth Playground, but can not sure the exact method to do that.
I have inputted my Client ID and ServerKey of Lagacy API of my Firebase dashboard.

But not successful.