add test generate password by manager with wrong data

tests/test_user.py

@@ -39,4 +39,19 @@ def test_generate_password_by_manager(mocked_send_mail, staff_client,
         data=data,
         status=status.HTTP_403_FORBIDDEN
     )
-
+    wrong_data = {
+        'email': 'no_user@example.com',
+    }
+    assert staff_client.post(
+        reverse('users:management-password'),
+        data=wrong_data,
+        status=status.HTTP_404_NOT_FOUND
+    )
+    wrong_email = {
+        'email': 'no_user@example',
+    }
+    assert staff_client.post(
+        reverse('users:management-password'),
+        data=wrong_email,
+        status=status.HTTP_400_BAD_REQUEST
+    )