I am starting work on a new application . I wanted it to have multiple users, but I didn't want to reinvent the wheel, so I decided to use a pre-existing gem called Devise. I am on a Mac using Ruby 2 , 3 and Rails 4. Add Devise If you want to run Bootstrap and/or Simple Form on your app, please follow the instructions on my blog post Bootstrap Your App before proceeding. I selected Devise simply because it was the most popular Rails Authentication gem at The Ruby Toolbox and I wanted to try it out. Add the devise gem to your Gemfile: Gemfile 1 gem 'devise' Next run install: 1 $ bundle install Taking a look at the Getting Started documentation, I followed the next steps. Run the generator: 1 $ rails generate devise:install Doing this also resulted in some intructions from Devise that I followed. I first defined the default url options in config/environments/development.rb by adding this line: confi
