title: Unity ads not initilizing automatically?
body: <p>I am using unity reward based Ads in my android/iOS game. but when I check it   <code>Advertisement.IsReady (rewardVideoID);</code></p>
  
  <p>always return false.  </p>
  
  <p>Also if check in Awake unity ads initialization is false  </p>
  
  <pre><code>void Awake ()
  {
      Debug.Log ("Unity ads ini state : " + Advertisement.isInitialized); //it is false everytime
  } 
  </code></pre>
  
  <p>But I have enabled ads in Unity Editor so here I want to know why unity ads are not auto initializing. I used unity ads in my previous project it is initializing automatically.</p>