Sidekiq middleware not logging to development.log - ruby-on-rails

Question

I would like to create a middleware that searches in the queues (typically default) if there are jobs with the same arguments.
Typically I send arguments like this:
perform(client_id, port_number)
I would like to be able to see, using the middleware, if there is already a client_id and a port_number in the default queue, and if there is I just return and I log it into the logger.
This is what I have so far (I want to log the data for now).
in config/initializers/sidekiq.rb I have
require 'sidekiq/api'
#Sidekiq default host redis://localhost:6379
Sidekiq.configure_server do |config|
config.redis = { url: 'redis://localhost:6379/12' }
end
Sidekiq.configure_client do |config|
config.redis = { url: 'redis://localhost:6379/12' }
config.client_middleware do |chain|
chain.add ArgumentLogging
end
end
Now, "ArgumentLogging" should be the class that will log the arguments; but I don't know where to add the code for the middleware to be honest.
I added it into app/middleware/argument_logging.rb
module Sidekiq
class ArgumentLogging
# #param [String, Class] worker_class the string or class of the worker class being enqueued
# #param [Hash] job the full job payload
# * #see https://github.com/mperham/sidekiq/wiki/Job-Format
# #param [String] queue the name of the queue the job was pulled from
# #param [ConnectionPool] redis_pool the redis pool
# #return [Hash, FalseClass, nil] if false or nil is returned,
# the job is not to be enqueued into redis, otherwise the block's
# return value is returned
# #yield the next middleware in the chain or the enqueuing of the job
def call(worker_class, job, queue, redis_pool)
# return false/nil to stop the job from going to redis
Rails.logger.info("Reading and logging #{queue} with arguments: #{job.inspect}")
yield
end
end
end
This is what I have so far. But I cannot see in my "development.log" file any string similar to "Reading and logging #{queue} with arguments: #{job.inspect}"
Does anyone know how to use Middleware and where should I put the code above?
I read all about https://github.com/mperham/sidekiq/wiki/Middleware and other StackOverflow questions and blogs, but it seems like I cannot understand why my code is not triggering.
Thank you and I look forward to hearing from you.
Rob