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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 ssh_get_mic(self, session_id, gss_kex=False):
 """ Create the MIC token for a SSH2 message. :param str session_id: The SSH session ID :param bool gss_kex: Generate the MIC for Key Exchange with SSPI or not :return: gssapi-with-mic: Returns the MIC token from SSPI for the message we created with ``_ssh_build_mic``. gssapi-keyex: Returns the MIC token from SSPI with the SSH session ID as message. """

        self._session_id = session_id
        if not gss_kex:
            mic_field = self._ssh_build_mic(
                self._session_id,
                self._username,
                self._service,
                self._auth_method,
            )
            mic_token = self._gss_ctxt.sign(mic_field)
        else:
            # for key exchange with gssapi-keyex
            mic_token = self._gss_srv_ctxt.sign(self._session_id)
        return mic_token