OpenIntegrations/docs/en/examples/Bitrix24/RefreshToken.txt

    ClientID     = FunctionParameters["Bitrix24_ClientID"];
    ClientSecret = FunctionParameters["Bitrix24_ClientSecret"];
    Refresh      = FunctionParameters["Bitrix24_Refresh"];

    Result = OPI_Bitrix24.RefreshToken(ClientID, ClientSecret, Refresh);