finish controller tests

spec/factories.rb

@@ -4,7 +4,7 @@ FactoryBot.define do
   factory :user do
     password = Faker::Internet.password(8)
 
-    provider { %w(greenlight google twitter).sample }
+    provider { %w(google twitter).sample }
     uid { rand(10**8) }
     name { Faker::Name.first_name }
     username { Faker::Internet.user_name }