Getting `nil` for id token

[amireldor]

Hi, this is sort-of-a cross-post with the Defold forums here: https://forum.defold.com/t/need-help-getting-id-token-from-google-play-services/73719

I'm trying to get an id_token from GPGS but I keep getting nil. I've set up the game.project with a client_id and request_id_token=1, but am not sure if I should be adding the Android Credentials client_id or a Web Credential client_id from the GCP panel.

The sign in is successful and I get the id and display name for my sign in, but I need the id_token as well for further authentication against Supabase in my case.

Can you help me with nailing down the cause of this? What might I be doing wrong?

Some quick code from my attempts (I try a silent login, and if that fails, I show a "sign in with Google" button.

function init(self)
	local welcome_gui_url = msg.url("main:/welcome#welcome")

	local function gpgs_callback(self, message_id, message)
	if message_id == gpgs.MSG_SIGN_IN or message_id == gpgs.MSG_SILENT_SIGN_IN then
		if message.status == gpgs.STATUS_SUCCESS then
			print("Signed in")
			print(gpgs.get_id())
			print(gpgs.get_display_name())
			print(gpgs.get_id_token())
			msg.post(welcome_gui_url, "set_sign_in_visibility", { visible = false })
		else
			print("Sign in error!")
			print(message.error)
			msg.post(welcome_gui_url, "set_sign_in_visibility", { visible = true })
		end
		elseif message_id == gpgs.MSG_SIGN_OUT then
			print("Signed out")
			msg.post(welcome_gui_url, "set_sign_in_visibility", { visible = true })
		end
	end


	if gpgs then
		gpgs.set_callback(gpgs_callback)
		gpgs.silent_login()
	else
		print("No gpgs")
		msg.post(welcome_gui_url, "set_sign_in_visibility", { visible = false })
	end
end

[amireldor]

Hmm, I put the call to get the id token elsewhere in the code, e.g. when I click somewhere on the screen, and the token was valid there (and not nil). I wrote some more details in the forum post I mentioned.

This probably has something to do with network latency or some other "race condition" issue :shrug:

[blendjam]

Still getting this issue inside the callback function

[britzl]

Still getting this issue inside the callback function

So you are calling gpgs.get_id_token() from within the callback when message.status == gpgs.STATUS_SUCCESS ?

Could you please try something like this with a timer.delay() to see if it is a timing issue:

function init(self)
	local function gpgs_callback(self, message_id, message)
	if message_id == gpgs.MSG_SIGN_IN or message_id == gpgs.MSG_SILENT_SIGN_IN then
		if message.status == gpgs.STATUS_SUCCESS then
			print("token", gpgs.get_id_token())
			timer.delay(2, false, function()
				print("token after delay", gpgs.get_id_token())
			end)
		end
	end

	if gpgs then
		gpgs.set_callback(gpgs_callback)
		gpgs.silent_login()
	end
end

[blendjam]

So, I didn't turn on request_id_token in game.project file. When I set request_id_token = 1, the GPGS popop doesn't show and in the callback I'm getting response in message as error = "Sign-in failed: DEVELOPER_ERROR (10). I've setup client_id, SHA-1 in .keystore file and added the client_id in google play console. IDK what I'm doing wrong.

[britzl]

DEVELOPER_ERROR

This seems relevant to your problem: https://stackoverflow.com/q/77466444