title: Is this class diagram correct according to this use case diagram?
body: <p>I am trying to create a class diagram which shows generalisation and maybe some form of aggregation or composition from this use case diagram. The intended system is to be a site/application similar to facebook social networking. </p>
  
  <p>USE CASE DIAGRAM:</p>
  
  <p><img src="https://i.stack.imgur.com/UZgtW.jpg" alt="enter image description here"></p>
  
  <p>CLASS DIAGRAM:</p>
  
  <p><img src="https://i.stack.imgur.com/PrK90.jpg" alt="enter image description here"></p>
  
  <p>I am pretty sure something is wrong with the class diagram please could someone help me out, thanks.</p>