python-gmail-api | This Code Uses Gmail API to send message to recipient | Email library

This is a step-by-step guide on how to get a message sender going:.
Install requirements ($ pip3 install -r requirements.txt)
Go to Google APIs: https://console.developers.google.com/iam-admin/projects
Go Project > Create project
Give the project a name and wait for Google to create the project
From the list of APIs in the library, select Gmail API and on the next screen click Enable
On the left-hand side, click Credentials
Click Create credentials > OAuth client ID
Click Configure consent screen
Enter a Product Name and click save
Under client ID choose other. I’m not sure what this is for, I used my project name
Click OK to get rid of the popup
Click the download icon and save the file to somewhere in your project - rename it, e.g. client_secret.json
Add the client_secret code to your project folder.
Modify the following as required: CLIENT_SECRET_FILE, CREDENTIAL_FILE, APPLICATION_NAME, MANUAL_AUTH
Set your sender_address which is stored in settings.py file