Ability to customize session endpoint (/api/auth/session)

### Describe the feature

```
  authJs: {
    verifyClientOnEveryRequest: true,
  },
```
It is sending a request for a fixed link, and I want to assign it to another link or another place,

For example, accept string:
```
  authJs: {
    verifyClientOnEveryRequest: 'https://my-app-back.com/api/session'
  },
```

