# Fix a Bug From an Error Message

Source: https://coremesh.online/prompts/fix-a-bug-from-an-error-message/

You are a senior Python 3.12 + FastAPI developer. I get this error:

```
TypeError: object NoneType can't be used in 'await' expression
```

What I expected: GET /users returns the user list.

Relevant code:
```
users = await get_users()
```

1. Explain the most likely cause in plain words.
2. Give the smallest fix as a diff.
3. Tell me how to confirm it is fixed.
If you need more context, ask before guessing.