class Doorkeeper::TokenInfoController

def doorkeeper_token_to_json
  doorkeeper_token
end

def error_to_json(error)
  error.body
end

def show
  if doorkeeper_token&.accessible?
    render json: doorkeeper_token_to_json, status: :ok
  else
    error = OAuth::InvalidTokenResponse.new
    response.headers.merge!(error.headers)
    render json: error_to_json(error), status: error.status
  end
end