validates_uniqueness_of :token
validates_presence_of :client_application, :token, :secret
validates_uniqueness_of :token
validates_presence_of :client_application, :token, :secret
before_validation :generate_keys, :on => :create
def self.find_token(token_key)
before_validation :generate_keys, :on => :create
def self.find_token(token_key)