Fix subs

app/models/payments_session.py

@@ -23,6 +23,14 @@ class PaymentsSession(db.Model):
     added = db.Column(db.DateTime(timezone=True), server_default=func.now())
     updated = db.Column(db.DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
 
+    @classmethod
+    def get_payment_session_with_session_id(cls, session_id):
+        paySession = cls.query.filter_by(session_id=session_id).first()
+        if not paySession:
+            raise ValueError(f"paySession with ID {session_id} does not exist.")
+        return paySession
+
+
     @classmethod
     def add_payment_session(cls, member_id, option_name, processor, session_id):