Refetch user info after completing registration

If we don't fetch the info again, the frontpage will redirect us back to /guestregister because the user does not have registration_completed_date set.

frontend/src/contexts/userContext.ts

@@ -5,6 +5,7 @@ interface IUserContext {
   user: User
   fetchUserInfo: () => void
   clearUserInfo: () => void
+  getUserInfo: () => void
 }
 
 function noop() {}
@@ -29,5 +30,6 @@ export const UserContext = createContext<IUserContext>({
   },
   fetchUserInfo: noop,
   clearUserInfo: noop,
+  getUserInfo: noop,
 })
 export const useUserContext = () => useContext(UserContext)