UserManager has verifyChannelAdmin, verifyChannelSubscribable, verifyChannelRole ChannelManager ALSO has verifyChannelAdmin, verifyChannelSubscribable, verifyChannelRole and they do the same thing except ChannelManager throws an exception
PROPOSED REFACTORING --------------------- 1) make UserManager methods throw InvalidChannelRoleException 2) remove the methods from ChannelManager 3) change the folks using CHannelManager to use UserManager. 4) TEST!!!