Assign a role to a user
stream-cli chat assign-role --type [channel-type] --id [channel-id] --user-id [user-id] --role [channel-role-name] [flags]
# Assign 'channel_moderator' role to user 'joe'
$ stream-cli chat assign-role --type messaging --id red-team --user-id joe --role channel_moderator
-h, --help help for assign-role
-i, --id string [required] Channel id
-r, --role string [required] Channel role name to assign
-t, --type string [required] Channel type such as 'messaging' or 'livestream'
-u, --user-id string [required] User id to assign a role to
--app string [optional] Application name to use as it's defined in the configuration file
--config string [optional] Explicit config file path