added DELETE user and prepared tables for cascade deletion

backend/src/main/java/ovh/herisson/Clyde/Services/AuthenticatorService.java

@@ -32,6 +32,7 @@ public class AuthenticatorService {
     }
 
     public InscriptionRequest register(InscriptionRequest inscriptionRequest) {
+        inscriptionRequest.setState(RequestState.Pending);
         return inscriptionService.save(inscriptionRequest);
     }
 

backend/src/main/java/ovh/herisson/Clyde/Services/UserService.java

@@ -126,4 +126,8 @@ public class UserService {
     public User getUserById(long id) {
         return userRepo.findById(id);
     }
+
+    public void delete(User user) {
+        userRepo.delete(user);
+    }
 }