OpenIntegrations/docs/en/examples/Slack/InviteUsersToChannel.txt

    Token   = "xoxb-6965308400114-696804637...";
    Channel = "C09MRB3P6N6";
    User    = "U06UABH3APP";

    Result = OPI_Slack.InviteUsersToChannel(Token, Channel, User);