How to use the aioimaplib.aioimaplib function in aioimaplib

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

        self.assertEquals('IMAP4REV1', imap_client.protocol.imap_version)
        self.assertEquals(['IMAP4rev1', 'LITERAL+', 'IDLE'], imap_client.protocol.capabilities)

def login_user(self, login, password, select=False, lib=aioimaplib.IMAP4):
        imap_client = aioimaplib.IMAP4(port=12345, loop=self.loop, timeout=3)
        yield from asyncio.wait_for(imap_client.wait_hello_from_server(), 2)

        yield from imap_client.login('user', 'password')

        if select:
            yield from imap_client.select()
        return imap_client

    def login_user(self, login, password, select=False, lib=aioimaplib.IMAP4):
        imap_client = aioimaplib.IMAP4(port=12345, loop=self.loop, timeout=3)
        yield from asyncio.wait_for(imap_client.wait_hello_from_server(), 2)

        yield from imap_client.login('user', 'password')

        if select:
            yield from imap_client.select()
        return imap_client