code: async def _drop_databases(cls) -> None:
          
          if not cls._inited:
              raise ConfigurationError("You have to call .init() first before deleting schemas")
          for connection in cls._connections.values():
              await connection.close()
              await connection.db_delete()
          cls._connections = {}
          await cls._reset_apps()
docs: Tries to drop all databases provided in config passed to ``.init()`` method.
          Normally should be used only for testing purposes.