フォロー
2017-04-16T11:39:17.893Z 1 TID-gn80db67g WARN: ActiveRecord::RecordInvalid: Validation failed: Username has already been taken
2017-04-16T11:39:17.893Z 1 TID-gn80db67g WARN: ActiveRecord::RecordInvalid: Validation failed: Username has already been taken