NameError in AuthorSessionsController

[IJSnapp]

When I try to login in to my app, I get the following error

NameError in AuthorSessionsController#create

def create
if login(params[:email], params[:password])
redirect_back_or_to(articles_path, notice: 'Logged in successfully.')
else
flash.now.alert = "Login failed."

My author_sessions controller was copied directly from the tutorial. I can't figure out what is wrong. Maybe I installed sorcery incorrectly, but that seems unlikely. Any ideas. Thanks!