**Patch Plan:**

1. **File: `store.py`**
   - **Function: `get_user`**
   - **Edit:** Normalize the email argument before using it as a dictionary key to match the normalization logic in `save_user`.
     - *Before:* `return USERS.get(email)`
     - *After:* `return USERS.get(email.strip().lower())`

2. **Regression Test:**
   - Verify that a user saved with a non-normalized email (e.g., extra whitespace and mixed case) can be successfully retrieved and logged in using the exact same non-normalized email.
   - *Example:*
     ```python
     def test_login_with_non_normalized_email():
         save_user("  User@Example.COM  ", "password_hash")
         assert login("  User@Example.COM  ", "password_hash") == True
     ```