rails model作成時のエラーについて

この度、railsでアプリケーションの作成を行っております。
deviseとomniauthを使用したログイン機能の実装を手始めに行っており、
gemのインストールは完了しております。

しかしdeviseやomniauthのインストールが済み、
ユーザのモデルを作成しようとターミナルでrails g user provider:string nickname:string image_url:stringを実行すると下記のようなエラーが発生してしまいます。

こちらも参考書に従って進めていたので何故エラーとなるのかが分からず困っています。
問題点が多いのでざっくりご説明して頂ければ結構です。

またrubyのバージョンは2.1.5
railsのバージョンが4.1.7
gemが2.4.4となっております。

アプリケーション作成の過程を通してrailsの全体像などを把握しようと思っており、
参考書についてはパーフェクトruby on railsの第６章を現在進めております。
かなり基本的なところでつまづいているかと思うので、アプリケーション作成にとりかかる前にやっておいた方が良さそうなことがあれば合わせてアドバイス頂けると助かります。

/Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:241:in load': /Users/takigasakisho/awesome_events/config/initializers/omniauth.rb:4: syntax error, unexpected '\n', expecting '=' end ^ (SyntaxError) from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:241:in block in load'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:232:in load_dependency' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:241:in load'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/engine.rb:648:in block in load_config_initializer' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/notifications.rb:161:in instrument'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/engine.rb:647:in load_config_initializer' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/engine.rb:612:in block (2 levels) in class:Engine'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/engine.rb:611:in each' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/engine.rb:611:in block in class:Engine'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/initializable.rb:30:in instance_exec' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/initializable.rb:30:in run'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/initializable.rb:55:in block in run_initializers' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:226:in block in tsort_each'
from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:348:in block (2 levels) in each_strongly_connected_component' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:418:in block (2 levels) in each_strongly_connected_component_from'
from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:427:in each_strongly_connected_component_from' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:417:in block in each_strongly_connected_component_from'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/initializable.rb:44:in each' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/initializable.rb:44:in tsort_each_child'
from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:411:in call' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:411:in each_strongly_connected_component_from'
from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:347:in block in each_strongly_connected_component' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:345:in each'
from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:345:in call' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:345:in each_strongly_connected_component'
from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:224:in tsort_each' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/tsort.rb:205:in tsort_each'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/initializable.rb:54:in run_initializers' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/railties-4.1.7/lib/rails/application.rb:300:in initialize!'
from /Users/takigasakisho/awesome_events/config/environment.rb:5:in <top (required)>' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in require'
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from /Users/takigasakisho/.rvm/gems/ruby-2.1.5@global/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in require' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5/gems/spring-1.1.3/lib/spring/application.rb:92:in preload'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5/gems/spring-1.1.3/lib/spring/application.rb:140:in serve' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5/gems/spring-1.1.3/lib/spring/application.rb:128:in block in run'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5/gems/spring-1.1.3/lib/spring/application.rb:122:in loop' from /Users/takigasakisho/.rvm/gems/ruby-2.1.5/gems/spring-1.1.3/lib/spring/application.rb:122:in run'
from /Users/takigasakisho/.rvm/gems/ruby-2.1.5/gems/spring-1.1.3/lib/spring/application/boot.rb:18:in <top (required)>' from /Users/takigasakisho/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in require'
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