Add all the insane error handling

[todo]

virwork_api/lib/Controller/UsersController.php

Lines 515 to 520 in 803ed9b

	// TODO: Add all the insane error handling
	/* @var $loginResult IUser */
	$loginResult = $this->userManager->checkPasswordNoLogging($userid, $password);
	if ($loginResult === false) {
	$users = $this->userManager->getByEmail($userid);
	// we only allow login by email if unique

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This issue was generated by todo based on a TODO comment in 803ed9b. It's been assigned to @Ajunboys because they committed the code.