login.rb doesn't run

ruby 2.1.5

Stacktrace:

```
login.rb:36:in `[]': no implicit conversion of Symbol into Integer (TypeError)
    from login.rb:36:in `block in do_auth'
    from login.rb:35:in `each'
    from login.rb:35:in `do_auth'
    from login.rb:57:in `<main>'
```
