[5.x] Fix eloquent:import-users command with computed values (#13260)

Author: duncanmcclean

src/Console/Commands/ImportUsers.php

@@ -73,6 +73,8 @@ private function importUsers()
         app()->bind(UserContract::class, FileUser::class);
         app()->bind(UserRepositoryContract::class, FileRepository::class);
 
+        User::clearResolvedInstances();
+
         $users = User::all();
 
         if ($users->isEmpty()) {