decode module id to string
        based on @antirez moduleTypeNameByID function from redis/src/module.c
        :param module_id: 64bit integer
        :return: string

def _decode_module_id(self, module_id):
        """
        decode module id to string
        based on @antirez moduleTypeNameByID function from redis/src/module.c
        :param module_id: 64bit integer
        :return: string
        """
        name = [''] * 9
        module_id >>= 10
        for i in reversed(range(9)):
            name[i] = self.charset[module_id & 63]
            module_id >>= 6
        return ''.join(name)