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

> function auth_ message_ operation_ details(op: gtx_ operation): text Builds a portion of the message that will be used to authorize account registration.
T

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.core.accounts.strategies/auth_message_operation_details/

FUNCTION

# auth\_message\_operation\_details

```signature
function auth_message_operation_details(op: gtx_operation): text
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/accounts/strategies/auth_message.rell#lines-43)

Builds a portion of the message that will be used to authorize account registration.
This portion gives the information about the operation that called `register_account`.

In a standard usage of the library, this operation would have the mount name of
`ft4.register_account`, found at `external.accounts.registration.register_account`

**Parameters**

* **op** — the operation that called the `register_account` function

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