There exist a way to handle a register information in the backend?

Hello guys i have an existential question about it is possible to send an event or capture the data when i register in my app using auth0, because i wanna do something like this :

- Register using universal login auth0
- Send the data of the user register to my backend
- Create a new custom field with values created in my backend
- Save the data in my database

i read some docs and i understand how to connect and use auth0 in the frontend and the backend like node.js with typescript

but i am not sure how to get the data in my backend after a user is register

is it possible?
some tutorial or something to follow?
docs ?

Thanks for reading, I appreciate any information about this, have a nice day :heart: