+* Add support to language into db model.
+
+[ok] Change all id to i64
+[ok] Check cookie lifetime -> Session by default
+[ok] Asynchonous email sending and database requests
+ [ok] Try to return Result for async routes (and watch what is printed in log)
+ [ok] Then try to make async database calls
+ [ok] Set email sending as async and show a waiter when sending email. Handle (and test) a timeout (~10s). -> (timeout put to 60s)
+[ok] How to log error to journalctl?
+[ok] Sign out
+[ok] Read all the askama doc and see if the current approach is good
+[ok] Handle 404
+[ok] Enable Logging to file.
+[ok] Implement the model as relational with SQLite.
+ [ok] Create and update functions.
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