anchor.diff:  
   + Parameters
       + game_id (required, number) - unique ID for the game
  -    + player_id (required, number) - Your player ID
  +    + player_id (required, number) - player ID requesting 
        
   + Response 200 (application/json)
       { 
  
positive.code: 
  Choosing to play the Ace of Spades will discard any card value while *also* discarding the opponent's card(s)
  
  + Parameters
      + game_id (required, number) - unique ID for the game
      + player_id (required, number) - your unique player ID
  
negative.code:     + creator_id (required, number) - unique ID for player creating the game
      + rival_id (required, number) - unique ID for opponent player to challenge
  
  ### Start a new game [GET,POST]
  + Response 200 (application/json)
      { 
          "game_id": '42',
  