Refactor code and improve error handling in authentication methods

This commit contains several changes including the removal of an unused onClick event handler in remove-member-dialog.tsx. It also includes an update to the POST handler in the Webhook route of the database API where the authentication property has been updated. Lastly, it also brings improvements in error handling and logging in various areas, such as e2e authentication tests and the mailbox utility.

packages/features/team-accounts/src/components/members/remove-member-dialog.tsx

@@ -89,7 +89,6 @@ function RemoveMemberForm({
             data-test={'confirm-remove-member'}
             variant={'destructive'}
             disabled={isSubmitting}
-            onClick={onMemberRemoved}
           >
             <Trans i18nKey={'teams:removeMemberSubmitLabel'} />
           </Button>