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

> function get_ auth_ details_ from_ auth_ operation(): (account_ id: byte_ array, auth_ descriptor_ id: byte_ array)? Retrieves the account and auth descrip

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

FUNCTION

# get\_auth\_details\_from\_auth\_operation

```signature
function get_auth_details_from_auth_operation(): (account_id: byte_array, auth_descriptor_id: byte_array)?
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/auth/authentication.rell#lines-803)

Retrieves the account and auth descriptor ID from the auth operation that precedes the
current operation, if any. Returns null if no operation precedes the current one, or it
is not an auth operation.

Can only be called from an operation.

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