incoming_webhook_url: the incoming webhook URL (Default: whatever is set as an env var).
icon_emoji: the icon emoji to use as the default.
username: the username to send messages from (will default to "slackr" if no username is set).
channel: Channel, private group, or IM channel to send message to. Can be an encoded ID, or a name. See the chat.postMessage endpoint documentation for details.
Returns
TRUE if successful (invisibly)
Examples
## Not run:# using `create_config_file()` after `slackr_setup()`create_config_file()# using `create_config_file()` before `slackr_setup()`create_config_file( token ="xox-", incoming_webhook_url ="https://hooks-", channel ="#general", username ="slackr", icon_emoji ="tada")slackr_setup()## End(Not run)