slack.com APIslackrSetup(channel = "#general", username = "slackr", icon_emoji = "",
token = "", incoming_webhook_url = "", api_token = "",
config_file = "~/.slackr", echo = FALSE)#general}}- username
{the username output will appear from (chr) defaults to slackr}
- icon_emoji
{which emoji picture to use (chr) defaults to none (can be