How to show a custom page after user completes onboarding with invitation link ?

**Is your feature request related to a problem? Please describe.**
I created invitation link as documented [here](https://docs.microsoft.com/en-us/azure/static-web-apps/authentication-authorization?tabs=invitations#create-an-invitation). But on completing the invitation, the user is taken directly to application home page. Is there a way I can show an onboarding complete page to the user? This improves user experience.

**Describe the solution you'd like**
Similar to [post_login_redirect_uri](https://docs.microsoft.com/en-us/azure/static-web-apps/authentication-authorization?tabs=invitations#post-login-redirect), allow onboarding completion path to be specified while generating invitation link.

**Describe alternatives you've considered**
None

**Additional context**
_Maybe_ an onboarding begin path can be specified as well. But that is something that can also be built outside of the service.