input: Write a python function to create a string representation of a Job object.
  assert str(Job("Engineer", "TechCorp", 70000)) == 'Job: Engineer, Company: TechCorp, Pay: 70000'
  assert str(Job("Designer", "DesignStudio", 50000)) == 'Job: Designer, Company: DesignStudio, Pay: 50000'
  assert str(Job("Manager", "BusinessInc", 90000)) == 'Job: Manager, Company: BusinessInc, Pay: 90000'
output: class Job:
      def __init__(self, title, company, pay):
          self.title = title
          self.company = company
          self.pay = pay
          
      def __str__(self):
          return f"Job: {self.title}, Company: {self.company}, Pay: {self.pay}"