Fix algorithm instantiation in PBKDF2HMAC

Author: ajhai

llmstack/base/models.py

@@ -284,7 +284,7 @@ def salt(self):
     @staticmethod
     def get_cipher(token, salt):
         kdf = PBKDF2HMAC(
-            algorithm=hashes.SHA256,
+            algorithm=hashes.SHA256(),
             iterations=100000,
             length=32,
             salt=salt,

llmstack/organizations/models.py

@@ -6,14 +6,12 @@
 from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
 from django.conf import settings
 from django.contrib.postgres.fields import ArrayField as PGArrayField
-from django.db import connection
-from django.db import models
+from django.db import connection, models
 from django.db.models.signals import post_save
 from django.dispatch import receiver
 
-from llmstack.common.utils.db_models import ArrayField
-
 from llmstack.apps.models import AppVisibility
+from llmstack.common.utils.db_models import ArrayField
 
 
 class Organization(models.Model):
@@ -159,7 +157,7 @@ def salt(self):
     @staticmethod
     def get_cipher(token, salt):
         kdf = PBKDF2HMAC(
-            algorithm=hashes.SHA256,
+            algorithm=hashes.SHA256(),
             iterations=100000,
             length=32,
             salt=salt,