title: Change the input value in shiny from server
body: <p>I have an action botton with <code>id=do</code>, i would want change the value of and input called rhm_clic when the acction boton is clicked. I have this at the moment.</p>
  
  <pre><code> observeEvent(input$do,{
     input$rhm_clic&lt;-NULL
   })
  </code></pre>