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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_room(self, vc_room, event):
 """Create a new Vidyo room for an event, given a VC room. In order to create the Vidyo room, the function will try to do so with all the available identities of the user based on the authenticators defined in Vidyo plugin's settings, in that order. :param vc_room: VCRoom -- The VC room from which to create the Vidyo room :param event: Event -- The event to the Vidyo room will be attached """

        client = AdminClient(self.settings)
        owner = retrieve_principal(vc_room.data['owner'])
        login_gen = iter_user_identities(owner)
        login = next(login_gen, None)
        if login is None:
            raise VCRoomError(_("No valid Vidyo account found for this user"), field='owner_user')

        extension_gen = iter_extensions(self.settings.get('indico_room_prefix'), event.id)
        extension = next(extension_gen)

        while True:
            room_mode = {
                'isLocked': False,
                'hasPIN': bool(vc_room.data['room_pin']),
                'hasModeratorPIN': bool(vc_room.data['moderation_pin'])
            }
            if room_mode['hasPIN']:
                room_mode['roomPIN'] = vc_room.data['room_pin']
            if room_mode['hasModeratorPIN']:
                room_mode['moderatorPIN'] = vc_room.data['moderation_pin']

            room_obj = client.create_room_object(
                name=vc_room.name,
                RoomType='Public',
                ownerName=login,
                extension=extension,
                groupName=self.settings.get('room_group_name'),
                description=vc_room.data['description'],
                RoomMode=room_mode)

            if room_obj.RoomMode.hasPIN:
                room_obj.RoomMode.roomPIN = vc_room.data['room_pin']
            if room_obj.RoomMode.hasModeratorPIN:
                room_obj.RoomMode.moderatorPIN = vc_room.data['moderation_pin']

            try:
                client.add_room(room_obj)
            except APIException as err:
                err_msg = err.message

                if err_msg.startswith('Room exist for name'):
                    raise VCRoomError(_("Room name already in use"), field='name')
                elif err_msg.startswith('Member not found for ownerName'):
                    login = next(login_gen, None)
                    if login is None:
                        raise VCRoomError(_("No valid Vidyo account found for this user"), field='owner_user')
                elif err_msg.startswith('Room exist for extension'):
                    extension = next(extension_gen)
                else:
                    raise

            else:
                # get room back, in order to fetch Vidyo-set parameters
                created_room = client.find_room(extension)

                if not created_room:
                    raise VCRoomNotFoundError(_("Could not find newly created room in Vidyo"))
                vc_room.data.update({
                    'vidyo_id': unicode(created_room.roomID),
                    'url': created_room.RoomMode.roomURL,
                    'owner_identity': created_room.ownerName
                })
                flag_modified(vc_room, 'data')
                vc_room.vidyo_extension = VidyoExtension(vc_room_id=vc_room.id, extension=int(created_room.extension),
                                                         owned_by_user=owner)

                client.set_automute(created_room.roomID, vc_room.data['auto_mute'])
                break