# after_authenticate · FT4 Rell API · Chromia Docs (concept)

> @extendable function after_ authenticate(account: account , account_ auth_ descriptor: account_ auth_ descriptor ?) This function can be extended by users 

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.core.auth/after_authenticate/

FUNCTION

# after\_authenticate

```signature
@extendable function after_authenticate(account: account, account_auth_descriptor: account_auth_descriptor?)
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/auth/authentication.rell#lines-23)

This function can be extended by users to add custom logic after the authentication of
an operation.

Throws when any extension of this function throws.

**Parameters**

* **account** — the account that is calling the operation
* **account\_auth\_descriptor** — the auth descriptor that has authenticated as account

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-rell/-f-t4%20-library/lib.ft4.core.auth/after_authenticate.html)Generated API reference, mirrored from the live docs