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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 user_create(self, cloudflare_email, cloudflare_pass, unique_id=None):
 """ Create new cloudflare user with selected email and id. Optionally also select unique_id which can be then used to get user information. :param cloudflare_email: new user cloudflare email :type cloudflare_email: str :param cloudflare_pass: new user cloudflare password :type cloudflare_pass: str :param unique_id: new user unique id :type unique_id: str (optional) :returns: :rtype: dict """

        params = {
            'act': 'user_create',
            'cloudflare_email': cloudflare_email,
            'cloudflare_pass': cloudflare_pass
        }
        if unique_id:
            params['unique_id'] = unique_id
        return self._request(params)