anchor.diff:  
   ### Get Game Grid [GET]
   
  -You may get a game's grid in form of an array of 9 strings. Each string may have a value of "x", "o" or null depending on whether an user has marked a tile or not.
  +You may get a game's grid in form of an array of 9 strings. Each string has a value of "x", "o" or null depending on whether an user has marked a tile or not.
   
   + Response 200 (application/json)
   
  
positive.code: 
  TicTacToe is an API, made with node.js, which allows users to play this game with other users.
  
  ## Users Collection [/users]
  
  ### List All Users [GET]
  
  
negative.code:         
              User does not exist
  
  ## Game [/games/{name_player_x}/{name_player_o}{?tile}]
  
  You may access a game through the names of its two players.
  
  ### Start New Game [POST]
  
  