Add members to a channel
stream-cli chat add-members --type [channel-type] --id [channel-id] [user-id-1] [user-id-2] ... [flags]
# Add members joe, jill and jane to 'red-team' channel
$ stream-cli chat add-members --type messaging --id red-team joe jill jane
-h, --help help for add-members
-i, --id string [required] Channel id
-t, --type string [required] Channel type such as 'messaging' or 'livestream'
--app string [optional] Application name to use as it's defined in the configuration file
--config string [optional] Explicit config file path