title: Is it possible to perform more validation after validationSchema, Yup, is passed?
body: <p>Currently, I am doing some validation such as min length, max length, required and so on using Yup in combination. I wonder if i could perform some more validation which need request and response from server side after Yup validation is passed?</p>
  
  <p>For example, i need a valid phone number format to be input first and after validate is passed, then I want to request to my backend to check if this phone number is existed. In case if it is already existed, then just set errors.phone: "Phone number is already registered." and show it inside ui using <code>{touched.phone &amp;&amp; errors.phone &amp;&amp; &lt;p&gt;{errors.phone}&lt;/p&gt;}</code>. Please help shine me some light. I could not find any solutions for this.</p>