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

> function map_ main_ auth_ descriptor(main_ auth_ descriptor: main_ auth_ descriptor ): (id: byte_ array, account_ id: byte_ array, account_ type: text, aut

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.external.accounts/map_main_auth_descriptor/

FUNCTION

# map\_main\_auth\_descriptor

```signature
function map_main_auth_descriptor(main_auth_descriptor: main_auth_descriptor): (id: byte_array, account_id: byte_array, account_type: text, auth_type: auth_type, args: gtv, rules: gtv, ctr: integer, created: integer)
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/external/accounts/mappers.rell#lines-26)

Maps the main authentication descriptor for the given account.

**Parameters**

* **main\_auth\_descriptor** — - The main authentication descriptor of the account to be mapped.

**Returns**

The mapped main authentication descriptor.

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