config.ru

use Rack::Auth::Basic do |login, password|
  # Account.find_by_login(login) returns a Hash:
  #   account = {:login => "dude", :password => "awesome"}
  account = Account.find_by_login(login) 
  account.authenticate(password)
end
run Fuck

# so...
use Rack::Auth::Basic do |login, password|
  account = Account.find_by_login(login) # => {:login => "dude", :password => "awesome"}
  account[:password] == password
end
run Fuck