cleaned all controllers

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

@@ -14,8 +14,8 @@ public class InscriptionService {
         this.inscriptionRepo = inscriptionRepo;
     }
 
-    public void save(InscriptionRequest inscriptionRequest){
-        inscriptionRepo.save(inscriptionRequest);
+    public InscriptionRequest save(InscriptionRequest inscriptionRequest){
+        return inscriptionRepo.save(inscriptionRequest);
     }
 
     public InscriptionRequest getById(long id){
@@ -26,9 +26,14 @@ public class InscriptionService {
         return inscriptionRepo.findAll();
     }
 
-    public void modifyState(long id, RequestState requestState) {
+    public boolean modifyState(long id, RequestState requestState) {
         InscriptionRequest inscriptionRequest = getById(id);
+
+        if (inscriptionRequest == null)
+            return false;
+
         inscriptionRequest.setState(requestState);
         save(inscriptionRequest);
+        return true;
     }
 }