Delete all of my messages in a specific text channel

User option (members/owners)
User will have the option to delete all of their messages at once on a specific Text channel. Regardless if they're a member or an owner of a discord channel.

All deleted messages cannot be retrieved. 

Reason for this option? When a user leaves a discord channel, he or she may want to leave no traces of their messages in a particular channel and/or server.  Atm, when a user leaves a server, all the messages they did on a Text channel in a particular server are still there.  This gives the user an option to delete a message / or all messages on a single click of a button.