In the list of available api services choose Gmail API v1;
Open the list and select auth/gmail.send; Press the Autorize APIs button;
Select the desired Google account; Press the "Allow" button;
Activate "Auto-refresh the token before it expires"; Click "Exchange authorization code for tokens";
Copy the value of the access_token field from the obtained object into notepad;
Important! Do not close the page or the token will be reset and cannot be used; Great, now we have an authorization token which we will use in the integration;
Now you can try automating your business with Latenode