```ruby
# Run transcoders on the episode.
class TranscodeEpisodeJob < ActiveJob::Base
  queue_as :default

  def perform(episode)
    if episode.audio_file_url.present?
      transcoder.create_job(
        pipeline_id: secrets.aws_audio_pipeline_id,
        input: { key: episode.audio_file_url },
        output: { key: episode.audio_file_url.gsub(/wav/, 'm3u8') }
      )
      episode.update transcoded: true
    end
  end

  private

  def transcoder
    @transcoder ||= Aws::ElasticTranscoder::Client.new(
      region: secrets.aws_region,
      credentials: {
        aws_access_key_id: secrets.aws_access_key_id,
        aws_secret_access_key: secrets.aws_secret_access_key
      }
    )
  end

  def secrets
    Rails.application.secrets
  end
end
```

Use a guard clause to return out of the method
user
```ruby
# Run transcoders on the episode.
class TranscodeEpisodeJob < ActiveJob::Base
  queue_as :default

  def perform(episode)
    return unless episode.audio_file_url.present?
    transcoder.create_job(
      pipeline_id: secrets.aws_audio_pipeline_id,
      input: { key: episode.audio_file_url },
      output: { key: episode.audio_file_url.gsub(/wav/, 'm3u8') }
    )
    episode.update transcoded: true
  end

  private

  def transcoder
    @transcoder ||= Aws::ElasticTranscoder::Client.new(
      region: secrets.aws_region,
      credentials: {
        aws_access_key_id: secrets.aws_access_key_id,
        aws_secret_access_key: secrets.aws_secret_access_key
      }
    )
  end

  def secrets
    Rails.application.secrets
  end
end
```
assistant