[IP-968] Sometimes a user isn't created, add more logging to see what's going on

[nielsdrost7]

Description

Sometimes a user isn't created during installation process. At this time all we can do is add logging.
I've also added a check whether there are 0 users in the database after the 'create_user' step.

If 0 users, redirect to 'create_user step'

Related Issue

addresses #968

Motivation and Context

It's a pain to add user manually after setup is complete:

1. Open ip_users table
2. Add user manually plus set password in a certain way.
3. These steps were discussed on the forums: https://community.invoiceplane.com

Pull Request Checklist

• My code follows the code formatting guidelines.
• I have an issue ID for this pull request.
• I selected the corresponding branch.
• I have rebased my changes on top of the corresponding branch.

Issue Type (Please check one or more)

• Bugfix