anchor.diff:  player_id was invalid for the provided game_
   
   ### Play a Card [POST]
  -Choose a card value to play. 
  -Until your opponent chooses their card for this round, you may update your choice
  +Choose a card value to play
   
  -Playing the Ace of Spades lets you discard any card while *also* discarding your opponent's card
  +This choice can be freely changed until both playeres have chosen their card for this round
  +
  +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
  
positive.code:     }
  
  + Response 200 (application/json)
  Once both players have chosen a card value, the server will resolve the round and update each player's hand
  
  + Response 401 
  player_id was invalid for the provided game_
  
  + Response 403 
  player_id did not have the selected card
negative.code:     { 
          "game_id": '42',
          "player_id" : '31337',
           "hand" : {
              "player_id" : '31337' 
              "cards": [ {value: '2', suit:'diamonds'}]
              }
  
  ## Playing the Game [/play]
  
  