Node js task : chat api

Supported routes:

Users:

• GET "api/users"- returns all users list
• GET "api/users/id"- returns user by id
• GET "api/users/id/chats"- returns all users with whom the user with the given id has conversed
• POST "api/users" - create new user
• PUT "api/users/id" - update user by id
• DELETE "api/users/id" - delete user by id

Messages:

• GET "api/messages"- returns all messages list
• GET "api/messages/id"- returns message by id
• POST "api/messages" - create new message
• PUT "api/messages/id" - update message
• DELETE "api/messages/id" - delete message