```ruby
require "uuidtools"
require 'digest/sha1'

module Roper
  module ActiveRecord
    class ClientRepository
      def model_class
        ActiveRecord::Client
      end

      def new(attributes = {})
        instance = model_class.new(attributes)
        instance.client_id = UUIDTools::UUID.random_create.to_s
        instance.client_secret = Digest::SHA1.hexdigest(UUIDTools::UUID.random_create.to_s)
        instance
      end

      def save(object)
        object.save
        return object
      end

      def find_by_client_id(client_id)
        model_class.find_by(:client_id => client_id)
      end
    end
  end
end
```

Remove unnecessary double hash of client_secret
user
```ruby
require "uuidtools"
require 'digest/sha1'

module Roper
  module ActiveRecord
    class ClientRepository
      def model_class
        ActiveRecord::Client
      end

      def new(attributes = {})
        instance = model_class.new(attributes)
        instance.client_id = UUIDTools::UUID.random_create.to_s
        instance.client_secret = UUIDTools::UUID.random_create.to_s
        instance
      end

      def save(object)
        object.save
        return object
      end

      def find_by_client_id(client_id)
        model_class.find_by(:client_id => client_id)
      end
    end
  end
end
```
assistant