> ## Documentation Index
> Fetch the complete documentation index at: https://docs.byzantine.fi/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Manage existing Byzantine accounts, users, and authenticators after creation.

Once a user or entity account exists, you use **Account management** endpoints to configure the account, add team members, and grant them roles with different permissions.

## Multi-users account management

Invite users to the account, update their roles (e.g. from `view` to `root`), and let them create passkeys so they can sign transactions. All operations are made by two steps: first, request a payload or OTP, then submit the signed payload.

## Bank account management

Configure the account for withdrawals: add one or more bank accounts so that off-ramp withdrawals can be initiated.