Given a vector of one or more channel names, retrieve list of
active channels and try to replace channels that begin with "#" or "@"
with the channel ID for that channel.
slackr_chtrans(channels, token = Sys.getenv("SLACK_TOKEN"))character vector - original channel list with # or
@ channels replaced with ID's.
Comma-separated list of channel names or IDs where the file will be shared.
Authentication token bearing required scopes.
Quinn Weber (ctb), Bob Rudis (aut)