nice check for authorization, especially since we haven't gone over OAuth yet. One way you could make this prompt clearer is to tell the user what inputs the program expect:

```ruby
def authenticate_code
	puts "Did you authorize linking your Dropbox account yet? (Y)es or (N)o"
	user_answer = gets.chomp.downcase # try to avoid one-letter variable names
	if user_answer == "y" # don't need the "then" statement in ruby
		...
	elsif user_answer == "n"
		...
	else
		puts "Two options, Yes or No."
		authenticate_code
	end
end
```