devise_token_auth：在Rails应用中安装无法运行

Question

I'm trying to start a project with devise_token_auth with the instructions of README.md file.
When i run rails g devise_token_auth:install User auth the console becomes locked and does not display any messages.

To create my project i followed these steps:

rails new foo
cd foo
bundle install

#then i add the gem 'devise_token_auth' to my Gemfile and after
bundle install

#now the problem...
rails g devise_token_auth:install User auth
#the console becomes locked with no messages

I'm using ubuntu 14.04 LTS, ruby-2.2.1 and my Gemfile looks like:

source 'https://rubygems.org'

gem 'rails', '4.1.6'
gem 'sdoc', '~> 0.4.0', group: :doc
gem 'pg'
gem 'spring', group: :development

gem 'devise_token_auth'

group :test do
  gem 'rspec-rails'
end

Does anyone know what could be wrong?

Answer 1

Credits to @errata

The problem was in my folder, which was not writable.
I just change the folder permissions and now it works.