Google Sign-In: I can't find "client-secret-file.json"

[sharktankful]

To setup google sign in authentification with the module, the documentation is asking me to use "client-secret-file.json" as follows:

# Get a reference to the auth service with provider secret file
auth = firebaseApp.auth(client_secret='client-secret-file.json')

# Reference to auth service with provider secret from env variable
client_secret_config = {
   "client_id": environ.get("CLIENT_ID"),
   "client_secret": environ.get("CLIENT_SECRET"),
   "redirect_uris": [environ.get("REDIRECT_URI")]
}

auth = firebaseApp.auth(client_secret=client_secret_config)

The problem is that I don't know where in firebase to find "client-secret-file.json". I'm looking all over firebase to see if its there in one of the settings to copy but I can't find it.

[AsifArmanRahman]

You can follow instructions provided by Google from here. Also, the first time I created the credentials myself, I saw a video from YouTube, link of which I'm sharing here as well.