add twitter and google oauth login

Gemfile

@@ -33,6 +33,7 @@ gem 'jbuilder', '~> 2.5'
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platform: :mri
+  gem 'dotenv-rails'
 end
 
 group :development do
@@ -48,4 +49,6 @@ end
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
 gem 'omniauth'
+gem 'omniauth-twitter'
+gem 'omniauth-google-oauth2'
 gem 'bigbluebutton-api-ruby'