def newUser(self):
        user = IrcUser(hashed=True)
        self.nextId += 1
        id = self.nextId
        self.users[id] = user
        self.flush()
        user.id = id
        return user
Gets the default images for each OS type in _default_image_patterns.
dataset/ETHPy150Open ProgVal/Limnoria/src/ircdb.py/UsersDictionary.newUser--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/PerfKitBenchmarker/perfkitbenchmarker/providers/azure/azure_virtual_machine.py/_GetDefaultImagesFromAzure