I am looking for a way to send an email with Google App Script (I know how to do that) which includes an approval button/link. When the user clicks the link/button in the email to approve the request, I want to trigger a script (this is the part I do not know if possible from email) which goes back to the Google Sheet and changes a value in a cell.
Example: User A submits a request using google form, and a new row is appended in SheetA. With some formulas, I automatically associate an ID = X to that request/row. A script will then send an email to user B to ask to approve the request of user A. User B will click a link in the email and the script will find the record X in SheetA and update a value in that row.