Resolve "debug authentication by magic link"

Fixes #71 (closed)

Bug fix

Context

See #71 (closed)

Breaking changes

• 🎖️ Some changes are not backward-compatible.

If this corresponds to a minor version change.

Removing some unnecessary parts in mailer.ts

Technical changes

bug fixes + refactoring

Unit tests: adding or modifying test cases

• 🛠️ Changes related to unit test functions

Scoutism

• 📖 Non-technical changes related to scoutism (renaming, small refactoring, typage...)

Non-technical changes

• 📖 Other changes untechnical (doc, configuration, ...)

Functional tests implemented

Describe how to test each case

Re-reading tips

• Order the rereading of the various files or pieces of code to be reread
• Prioritize the potential importance of particular pieces of code
• Special request