<.packageGitScope.credentials.username>: nil pointer evaluating interface {}.username

Bug

Description

Going through the quickstart on k3d. On step 10, I received the error:

Release "bigbang" does not exist. Installing it now.
Error: template: bigbang/templates/tempo/gitrepository.yaml:23:6: executing "bigbang/templates/tempo/gitrepository.yaml" at <include "gitCredsExtended" $gitCredsDict>: error calling include: template: bigbang/templates/_helpers.tpl:77:73: executing "gitCredsExtended" at <.packageGitScope.credentials.username>: nil pointer evaluating interface {}.username

K8s Version

$ k version --short                                                                                                                                                                       
Client Version: v1.27.2
Kustomize Version: v5.0.1
Server Version: v1.27.1+k3s1

BigBang Version

What version of BigBang were you running?

trying to install Big Bang 2.16.0 (ran git checkout tags/2.16.0)