title: Gatling make one scenario run once in a chain of scenarios
body: <p>I have a scenario where I have to perform certain steps. But I do not want the users to log in multiple times. So i chained the scenarios, but the login still happens multiple times. Is there any way to restrict part of the chain to run only once?</p>
  
  <pre><code>class CreateUserSimulation extends Simulation {
  val login = Login.getExec()
  val userCreate = UserCreate.getExec("basic")
  val userJourney = scenario("User Journey")
      .exec(login)
      .exec(userCreate)
  
  setUp(      
      userJourney.inject(constantConcurrentUsers(10) during (2 seconds))
  ).protocols(Params.httpProtocol)
  </code></pre>
  
  <p>}</p>