Automating Google Ads API Refresh Token Generation and Renewal

I'm using the Google Ads API to retrieve information from Google Ads campaigns. Initially, I manually generated a new refresh token by following specific steps to obtain an authorization code using a designated Google ID. Subsequently, I sent a CURL request with that code to generate a refresh token. Now, I aim to automate the entire process to convert the script, responsible for fetching Google Ads campaign data, into a full-time scheduler by automating the generation and renewal of the refresh token. Unfortunately, I'm encountering difficulties in achieving this. Is there a specific code or method available to accomplish the aforementioned task?

I would like to obtain the process and code for the aforementioned issue.