Delete of system user works but gives a large error message

[ChurchCRMBugReport]

When you do a delete of a system user it works fine but it gives a large error message shown below:

ERROR
Error making API Call to: /matrikel/api/users/237

Error text: Identifier "Logger" is not defined.

Stack Trace:

[
  "#0 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/Container.php(172): Slim\\Container->get('Logger')",
  "#1 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/api/routes/users/users-admin.php(70): Slim\\Container->__get('Logger')",
  "#2 [internal function]: Closure->{closure}(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Array)",
  "#3 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(41): call_user_func(Object(Closure), Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Array)",
  "#4 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/Route.php(335): Slim\\Handlers\\Strategies\\RequestResponse->__invoke(Object(Closure), Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Array)",
  "#5 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/ChurchCRM/Slim/Middleware/Request/Auth/BaseAuthRoleMiddleware.php(28): Slim\\Route->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#6 [internal function]: ChurchCRM\\Slim\\Middleware\\Request\\Auth\\BaseAuthRoleMiddleware->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Slim\\Route))",
  "#7 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(ChurchCRM\\Slim\\Middleware\\Request\\Auth\\AdminRoleAuthMiddleware), Array)",
  "#8 [internal function]: Slim\\DeferredCallable->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Slim\\Route))",
  "#9 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\\DeferredCallable), Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Slim\\Route))",
  "#10 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\\Route->Slim\\{closure}(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#11 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/Route.php(313): Slim\\Route->callMiddlewareStack(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#12 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/App.php(495): Slim\\Route->run(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#13 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/ChurchCRM/Slim/Middleware/VersionMiddleware.php(13): Slim\\App->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#14 [internal function]: ChurchCRM\\Slim\\Middleware\\VersionMiddleware->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Slim\\App))",
  "#15 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(ChurchCRM\\Slim\\Middleware\\VersionMiddleware), Array)",
  "#16 [internal function]: Slim\\DeferredCallable->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Slim\\App))",
  "#17 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\\DeferredCallable), Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Slim\\App))",
  "#18 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/ChurchCRM/Slim/Middleware/AuthMiddleware.php(38): Slim\\App->Slim\\{closure}(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#19 [internal function]: ChurchCRM\\Slim\\Middleware\\AuthMiddleware->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Closure))",
  "#20 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(ChurchCRM\\Slim\\Middleware\\AuthMiddleware), Array)",
  "#21 [internal function]: Slim\\DeferredCallable->__invoke(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Closure))",
  "#22 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\\DeferredCallable), Object(Slim\\Http\\Request), Object(Slim\\Http\\Response), Object(Closure))",
  "#23 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\\App->Slim\\{closure}(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#24 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/App.php(388): Slim\\App->callMiddlewareStack(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#25 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/vendor/slim/slim/Slim/App.php(296): Slim\\App->process(Object(Slim\\Http\\Request), Object(Slim\\Http\\Response))",
  "#26 /customers/0/e/8/pingsteskilstunaweb.se/httpd.www/matrikel/api/index.php(76): Slim\\App->run()",
  "#27 {main}"
]

Collected Value Title	Data
Page Name	/matrikel/UserList.php
Screen Size	1080x1920
Window Size	937x1920
Page Size	937x1920
Platform Information	Linux pingsteskilstunaweb.se 5.3.0-26-generic #28~18.04.1-Ubuntu SMP Wed Dec 18 16:40:14 UTC 2019 x86_64
PHP Version	7.3.15
SQL Version	5.5.5-10.3.21-MariaDB-1:10.3.21+maria~bionic
ChurchCRM Version	4.0.2
Reporting Browser	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36
Prerequisite Status	All Prerequisites met
Integrity check status	{"status":"failure","message":"En eller flera filer misslyckades signaturvalidering","files":[{"filename":"locale/js/sv_SE.js","status":"Hash Mismatch","expectedhash":"e1a2fe64f0fd286be53daad2046daa98a4f85233","actualhash":"b174479148be804885ff0cbb68c74abaabb7354a"}]}

[crossan007]

Specifically, this error occurs after a user is deleted and the email failed to send to the user either due to invalid SMTP settings, or because the SMTP server rejected the message.

That said, deleting a user should almost certainly NOT send an email to the user telling them their account has been deleted; this behavior seems a bit off to me. I think moving the control for this behavior to an admin-configurable setting would be appropriate