Trying to get OAuth2 tokens for Google Auth just fails

        const body = new URLSearchParams({
            code,
            client_id: this.clientId,
            client_secret: this.clientSecret,
            redirect_uri: this.redirectUrl,
            grant_type: "authorization_code",
        });



        const res = await fetch("https://oauth2.googleapis.com/token", {
            method: "POST",
            headers: {
                "Content-Type": "application/x-www-form-urlencoded",
            },
            body,
        });