How to use the aioimaplib.aioimaplib.IMAP4 function in aioimaplib

def test_login(self):
        imap_client = aioimaplib.IMAP4(port=12345, loop=self.loop, timeout=3)
        yield from asyncio.wait_for(imap_client.wait_hello_from_server(), 2)

        result, data = yield from imap_client.login('user', 'password')

        self.assertEquals(aioimaplib.AUTH, imap_client.protocol.state)
        self.assertEqual('OK', result)
        self.assertEqual('LOGIN completed', data[-1])

if 'ENABLE' not in self.protocol.capabilities:
            raise Abort('server has not ENABLE capability')

        return (yield from asyncio.wait_for(self.protocol.simple_command('ENABLE', capability), self.timeout))

    def has_capability(self, capability):
        return capability in self.protocol.capabilities


def extract_exists(response):
    for line in response.lines:
        if 'EXISTS' in line:
            return int(line.replace(' EXISTS', ''))


class IMAP4_SSL(IMAP4):
    def __init__(self, host='127.0.0.1', port=IMAP4_SSL_PORT, loop=asyncio.get_event_loop(),
                 timeout=IMAP4.TIMEOUT_SECONDS, ssl_context=None):
        super().__init__(host, port, loop, timeout, None, ssl_context)

    def create_client(self, host, port, loop, conn_lost_cb=None, ssl_context=None):
        if ssl_context is None:
            ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
        super().create_client(host, port, loop, conn_lost_cb, ssl_context)


# functions from imaplib
def int2ap(num):
    """Convert integer to A-P string representation."""
    val = ''
    ap = 'ABCDEFGHIJKLMNOP'
    num = int(abs(num))