get_user_info does not work with requests module properly

[cringoleg]

    def get_user_info(self, recipient_id, fields=None):
        """Getting information about the user
        https://developers.facebook.com/docs/messenger-platform/user-profile
        Input:
          recipient_id: recipient id to send to
        Output:
          Response from API as <dict>
        """
        params = {}
        if fields is not None and isinstance(fields, (list, tuple)):
            params['fields'] = ",".join(fields)

        params.update(self.auth_args)

        request_endpoint = '{0}/{1}'.format(self.graph_url, recipient_id)
        response = requests.get(request_endpoint, params=params)
        if response.status_code == 200:
            return response.json()

        return None

When passing params in func get_user_info(), module requests interprets the string with passed parameters and changes all commas to comma escape character.
In the end, the URL part with passed parameters ['time_zone', 'first_name'] looks like this: fields=time_zone%2Cfirst_name, but in messenger API it should look like this: fields=time_zone,first_name

[cringoleg]

Nevermind, it works good :)