Fix auth_model uuid with sqlite

compendium_v2/db/auth_model.py

@@ -25,7 +25,7 @@ class ROLES(Enum):
     user = "user"
 
 
-uuid_pk = Annotated[UUID, mapped_column(primary_key=True, default=lambda _: str(uuid4()))]
+uuid_pk = Annotated[UUID, mapped_column(primary_key=True, default=lambda _: uuid4())]
 int_pk_fkNREN = Annotated[int, mapped_column(ForeignKey("nren.id"), primary_key=True)]
 
 # TODO: active should be default False and require admin approval
@@ -71,3 +71,13 @@ class User(UserMixin, db.Model):
     @property
     def is_active(self):
         return self.active
+
+    @property
+    def is_admin(self):
+        return self.roles == ROLES.admin
+
+    @property
+    def nren(self):
+        if len(self.nrens) == 0:
+            return None
+        return self.nrens[0]