title: No 'Access-Control-Allow-Origin' header is present on the requested resource in keycloak
body: <p>I am hitting Key cloak api <a href="http://localhost:8080/auth/realms/" rel="noreferrer">http://localhost:8080/auth/realms/</a>**/protocol/openid-connect/token
  with right credentials ,its working fine but with wrong credentials</p>
  
  <p><a href="https://i.stack.imgur.com/AQlwx.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AQlwx.png" alt="enter image description here"></a></p>
  
  <p>And when I add the cross-origin-allow , it give me preflight error </p>
  
  <p>can anyone please help me :)
  PS: everything is working fine with CORS plugin</p>