Quite some work done here.

config/packages/security.yaml

@@ -4,20 +4,28 @@ security:
         Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface: 'auto'
     # https://symfony.com/doc/current/security.html#loading-the-user-the-user-provider
     providers:
-        users_in_memory: { memory: null }
+        app_user_provider:
+            entity:
+                class: App\Tech\Entity\User
+                property: email
     firewalls:
         dev:
             pattern: ^/(_(profiler|wdt)|css|images|js)/
             security: false
         main:
             lazy: true
-            provider: users_in_memory
-
-            # activate different ways to authenticate
-            # https://symfony.com/doc/current/security.html#the-firewall
-
-            # https://symfony.com/doc/current/security/impersonating_user.html
-            # switch_user: true
+            provider: app_user_provider
+            user_checker: App\Tech\Service\UserChecker
+            form_login:
+                login_path: app_login
+                check_path: app_login
+                enable_csrf: true
+                username_parameter: email
+                password_parameter: password
+            logout:
+                path: app_logout
+                # where to redirect after logout
+                # target: app_any_route
 
     # Easy way to control access for large sections of your site
     # Note: Only the *first* access control that matches will be used