How get data from redirectURI ?

Hi dear,

For the query value, the response parameters are added to the redirect URI value as query parameters, and the browser is redirected to the resulting value. I see it in Incorporating Sign in with Apple into Other Platforms. I don't know how to get data from that.

This is sample code :

clientId: 'com.example',
scope: 'name email',
redirectURI: 'https://example.com/login',
state: ['STATE'],
response_mode:'form_post',
response_type:'form_post',

note : I'm not using Popup .

When it redirected to https://example.com/login it just the login page but I don't know how to get name or email from it,
How get data from redirectURI ?
 
 
Q