Step 1 - Add PHC-Members to your gemfile

gem 'phcmemberspro', '~> 3.7', '>= 3.7.5'
bundle exec install

Step 2 - Add database migration files

rake railties:install:migrations
rake db:migrate

Step 3 - Mount in your Routes File

Mount the Engine in your Routes File

mount Phcmemberspro::Engine, :at => '/'