How to get user in fuction

i want to get the user id of the requestor inside a function. How can i achive this?

https://appwrite.io/docs/products/functions/development#headers

You can get it from the header x-appwrite-user-id

Okay, sorry for not reading the docs. does the overlaying framework fill this field?

Not really, if you want the id of the user that triggered the function you can do something like this.

const headers = req.headers
const userId = headers['x-appwrite-user-id'];
...

is this field validated tho? link, can someone just send a request with an existing user id in this field an the function will accept it?

https://discord.com/channels/564160730845151244/564160731327758347/1201964884762558524

Here is a discussion someone else had with the same question earlier today, beyond this I'm not entirely sure if it's validated.

From what I understand from the source code, it's being validated server side to ensure it's not being spoofed:
https://github.com/appwrite/appwrite/blob/47ea083ea4bac0b2299b0b8d3fbe7648dac44af7/app/controllers/api/functions.php#L1573