Password Recovery with Flutter Web App

I am new to flutter and i am using feature Password Recovery. I could do to step redirect to my app UpdatePasswordPage by click link in email , but i am still stuck with receive this link to get userId and secret key. Can i reference with example code or keyword for me can result this problem? Tks for your help!

TL;DR

OP is a new Flutter user working on password recovery functionality for their web app. They have successfully implemented the step to redirect to the UpdatePasswordPage by clicking the link in the email. However, they are now stuck on how to receive the link to retrieve the userId and secret key. They are asking for examples or keywords to help solve this issue. The suggested solution is to refer to an example in a YouTube video (https://www.youtube.com/watch?v=rp6KcMVWCAE) that explains how to implement email verification, as the same principles apply to password recovery.