goldfinger_user_deck_author

## within Deck MODEL
belongs_to :author, class_name :user

# in the DECK migration - add column 
t.references :author

# in USER MODEL
has_many :played_decks, through: :rounds, source: "Deck"
has_many :authored_decks, class_name: "Deck"

  ## user has relationship to deck in 2 ways
  # 1 => as a player
  # 2 => as a an author 

  # =>  User.played_decks
  # =>  User.authored_decks