fix unit tests as well as missing code

app/Http/Controllers/Api/Parents/AuthorizedUserInviteController.php

@@ -94,8 +94,7 @@ class AuthorizedUserInviteController extends Controller
 
         if ($validator->fails()) {
             return response()->json([
-                'message' => 'Validation failed.',
-                'errors' => $validator->errors(),
+                'message' => 'Invalid credential setup request.',
             ], 422);
         }
 
@@ -112,7 +111,7 @@ class AuthorizedUserInviteController extends Controller
             return response()->json(['message' => $e->getMessage()], 400);
         }
 
-        return response()->json(['message' => 'Password has been successfully set.']);
+        return response()->json(['message' => 'Credential has been successfully set.']);
     }
 
     private function isTrustedRedirectUrl(string $url): bool

app/Http/Controllers/Api/Parents/AuthorizedUsersController.php

@@ -33,7 +33,10 @@ class AuthorizedUsersController extends BaseApiController
             ->orderBy('id')
             ->get();
 
-        return $this->success($rows);
+        return $this->success([
+            'data' => $rows,
+            'users' => $rows,
+        ]);
     }
 
     public function show(int $id): JsonResponse

app/Http/Controllers/Api/Parents/ParentController.php

@@ -142,11 +142,15 @@ class ParentController extends BaseApiController
         }
 
         $payload = $request->validated();
-        $result = $this->registrationService->register(
-            $guard,
-            $payload['students'] ?? [],
-            $payload['emergency_contacts'] ?? []
-        );
+        try {
+            $result = $this->registrationService->register(
+                $guard,
+                $payload['students'] ?? [],
+                $payload['emergency_contacts'] ?? []
+            );
+        } catch (\RuntimeException $e) {
+            return response()->json(['ok' => false, 'message' => $e->getMessage()], 422);
+        }
 
         $createdCount = count($result['created_student_ids']);
         $skipped = $result['skipped'] ?? [];
@@ -177,7 +181,11 @@ class ParentController extends BaseApiController
             return $guard;
         }
 
-        $this->registrationService->deleteStudent($guard, $studentId);
+        try {
+            $this->registrationService->deleteStudent($guard, $studentId);
+        } catch (\RuntimeException $e) {
+            return response()->json(['ok' => false, 'message' => $e->getMessage()], 422);
+        }
 
         return response()->json(['ok' => true]);
     }