Auth service

[tshemsedinov]

• Category Session marked with Local decorator, it means that it will not be replicated or sharded between multiple servers. But we will move sessions between servers problematically or store same token in multiple servers at a time.
• Auth service will have separated IP and will generate tokens and save them in certain serves as local.
• Auth service will send to client application list of IPs and ports allowed for this session. Connection to other IPs and ports should be dropped.