* Added comments to test_login.py
-Added comments to each test function to provide clear documentation of the test steps.
-Comments detail the purpose of each test, the actions taken, and the expected outcomes.
-Improved readability and maintainability of the test suite.
-No changes in functionality; only added comments for better code understanding.
* Removed comments from import file in test_login.py
* Use canonical email for registration, check both when checking if user exists
* Fix test
* Set pagesize to 100
Co-authored-by: Adrià Casajús <adria.casajus@proton.ch>