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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 chat_postEphemeral(self, *, channel: str, user: str, **kwargs) -> SlackResponse: """Sends an ephemeral message to a user in a channel. Args: channel (str):
 The channel id. e.g. 'C1234567890' user (str):
 The id of user who should see the message. e.g. 'U0BPQUNTA' text (str):
 The message you'd like to share. e.g. 'Hello world' text is not required when presenting blocks. blocks (list):
 A dictionary list of blocks. Blocks are required when not presenting text. e.g. [{"type": "section", "text": {"type": "plain_text", "text": "Hello world"}}] """

        kwargs.update({"channel": channel, "user": user})
        return self.api_call("chat.postEphemeral", json=kwargs)