title: Need to validate REST API body requests
body: <p>I have some doubts  related with sequelize . Please help me to resolve those . I want to validate REST API body requests using sequeulize . is that good approach ? if YES , how can i do that ? if NO , do i need to use any 3rd party NPM library for that ? like fast-validators</p>
  <p>Example : I want to validate whether user has  empty username &amp; password inputs. is that possible me to use sequeulize to do that ?</p>