<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _find_account(app, user, account_name):
 """For a given account name, returns the Account object. Raises an exception if not found. """

    if not account_name:
        raise ConsoleError("Empty account name given")

    accounts = api.search_accounts(app, user, account_name)

    if account_name[0] == "@":
        account_name = account_name[1:]

    for account in accounts:
        if account['acct'] == account_name:
            return account

    raise ConsoleError("Account not found")