Requesting App Access

Creating a Software organization requires a GitHub organization. By default, OAuth app access restrictions are enabled for GitHub organizations: 

When OAuth app access restrictions are enabled, organization members and outside collaborators cannot authorize OAuth app access to organization resources. Organization members can request owner approval for OAuth apps they'd like to use, and organization owners receive a notification of pending requests.

If you do not see your GitHub organization when trying to create a Software organization, you will need to request that an organization admin approves the Software application for use in your organization. 

You can request access from your GitHub account, or follow GitHub’s guide on how to request OAuth app access. An organization admin will then need to approve the request.