better

app/jobs/sendinblue/sms_credits_warning_job.rb

 class Sendinblue::SmsCreditsWarningJob < ApplicationJob
   queue_as :default
 
-  SMS_CREDITS_LIMIT = 500
-
   def perform
     return unless ENV['APPLICATION_ENV'] == 'production'
-    api_instance = SibApiV3Sdk::AccountApi.new
-    result = api_instance.get_account
-    sms_credits = result.plan.detect { |plan| plan.type == 'sms' }&.credits
-    if sms_credits.present? && sms_credits < SMS_CREDITS_LIMIT
+    if Sendinblue.SmsService.low?
       # this message is sent to server_admins only, and server_admins are duplicated between all universities.
       # so we take the first university
       NotificationMailer.low_sms_credits(University.first, sms_credits).deliver_later

app/services/sendinblue/sms_service.rb

 module Sendinblue
   class SmsService
     DEFAULT_SENDER_NAME = 'Osuny'.freeze
+    SMS_CREDITS_LIMIT = 500
+    
+    def self.low?
+      api_instance = SibApiV3Sdk::AccountApi.new
+      result = api_instance.get_account
+      sms_credits = result.plan.detect { |plan| plan.type == 'sms' }&.credits
+      sms_credits.present? && sms_credits < SMS_CREDITS_LIMIT  
+    end
 
     def self.send_mfa_code(user, code)
       duration =  ActiveSupport::Duration.build(Rails.application.config.devise.direct_otp_valid_for).inspect