Pending users are shown as blank entries in Group Members CSV Export List

Summary

When exporting members using the Group Member Export feature, the CSV file has blank entries for users with pending invitations to the group.

Zendesk ticket: Internal Link

Steps to reproduce

Generate an export while having pending invitations to the group.

What is the current bug behavior?

Blank entries are in place for pending users to the group.

What is the expected correct behavior?

We could not show these entries as these users aren't members of the group during generation. Or we can show them in a separate section on the file as pending users.

Output of checks

This bug happens on GitLab.com