Update main.py

[theflyfoxX]

• Change status code to 200 OK unless you are creating a token/session. change 409 to 404, 409 CONFLICT is used when there's a conflict endpoint get users update :
  -> Explicitly checks if the requester identity is missing
  -> Ensures only valid users can access the endpoint (optional but recommended)
  -> Use limit offset , to prevent overwhelming the client
  -> Adds validation to ensure values are within acceptable ranges