docs: def get_refresh_token(code, app_secret):
          "tokens = get_refresh_token(code:str,app_secret:str)"
          "tokens['access_token']"
          "tokens['username']"
          "tokens['refresh_token']"
          token_api = "https://steemconnect.com/api/oauth2/token?code={}&client_secret={}".format(code, app_secret)
          return requests.post(token_api).json()