Add UUID for user model

backend/server/users/models.py

@@ -1,9 +1,11 @@
+import uuid
 from django.contrib.auth.models import AbstractUser
 from django.db import models
 from django_resized import ResizedImageField
 
 class CustomUser(AbstractUser):
     profile_pic = ResizedImageField(force_format="WEBP", quality=75, null=True, blank=True, upload_to='profile-pics/')
+    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True, primary_key=True)
 
     def __str__(self):
         return self.username