Returns a token to be used x number of times to allow a user account to access
        certain resource.

def make_token(cls, ephemeral_token: 'RedisEphemeralTokens') -> str:
        """
        Returns a token to be used x number of times to allow a user account to access
        certain resource.
        """
        value = ephemeral_token.key
        if ephemeral_token.scope:
            value += ''.join(ephemeral_token.scope)

        return get_hmac(cls.KEY_SALT + ephemeral_token.salt, value)[::2]