Do not delete users that have an ExternalCredit entry, which means

they completed the subscription billing process.

Signed-off-by: Birin Sanchez <birin.sanchez@puri.sm>
1 job for 350_delete_not_paid in 38 seconds (queued for 1 second)
Status Job ID Name Coverage
  Deb
passed #27012
liberty
deb

00:00:38