anchor.diff:  + Request
       + Headers
   
  -        Auth: {token}
  +            Auth: {token}
   
   + Response 200 (application/json)
  +
           {
               "message": "Token prolonged.",
           }
  
positive.code: + Request
      + Headers
  
          Auth: {token}
  
  + Response 200 (application/json)
          {
              "message": "Token deleted.",
          }
  
negative.code: 
  Simple Node js server for Discussion board.
  
  # Group Authentication
  
  ## API token authentication [/auth]
  
  ### Generate new token. [POST]
  
  Providing `login` and `password` of existing user returns authentication token for comunication with API. Returned token must by provided in `Auth` header with each subsequent request, otherwise you get back **401 Unauthorized** status code.
  + Request
  
      + Body
      
              {
                  "login": "login",
                  "password": "password"
              }
  
  + Response 200 (application/json)
  
          {
              "token": "{ac4cb54caac5bca7ef455}",
          }
  
  + Response 404 (application/json)
  
          {
              "message": "Sorry, bad login or password.",
          }
  