fix tests

app/logical/twitter_api.rb

@@ -0,0 +1,12 @@
+class TwitterApi
+  def client
+    api_token = Cache.get("twitter-api-token")
+    hoge = Twitter::Rest::Client.new do |config|
+      config.consumer_key = Danbooru.config.twiter_api_key
+      config.consumer_secret = Danbooru.config.twitter_api_secret
+      config.bearer_token = api_token if api_token
+    end
+    Cache.put("twitter-api-token", hoge.bearer_token)
+    hoge
+  end
+end