Peer to Peer Messaging App/Software

I need a peer to peer messaging system in which the user can create his account, login, add other users via a unique pin, send messages and logout after chatting. This needs to be a very basic app having a clean, well formatted and commented source code. It can be for either android or windows pc, whichever is easier. I need it before 20th Nov, so if you have such a messaging app already made, that would be better. ## Deliverables [login to view URL] requirements notice: As originally posted, this project does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite.