Integrating OAuth authentication with pipedrive in react

Hi, I’ve followed the pipedrive OAuth documentation. I’ve created a test application at Marketplace Manager. Then I used the client_id from the test app in an anchor tag as follows.
<a href="{client_id}&state=148aHxbdd92&redirect_uri=http://localhost:3000">Login User</a> But unfortunately im redirected to the following page.

Hi Raqeeb,

Could you outline the steps you’re taking before you reach this page?