[MM-42918] Add debug information for setup wizard

[hanzei]

Summary

I'm unable to reproduce the issue linked in the ticket.

To debug the issue if it occurs again, I've added debug information on why exactly the wizard didn't run.

If the PR gets approved, I'm going to copy the change into https://github.com/mattermost/mattermost-plugin-gitlab.

Ticket Link

https://mattermost.atlassian.net/browse/MM-42918

[codecov-commenter]

Codecov Report

Patch coverage: 59.09% and project coverage change: +0.17 🎉

Comparison is base (64a725b) 15.46% compared to head (25ec692) 15.63%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #679      +/-   ##
==========================================
+ Coverage   15.46%   15.63%   +0.17%     
==========================================
  Files          15       15              
  Lines        5497     5518      +21     
==========================================
+ Hits          850      863      +13     
- Misses       4605     4613       +8     
  Partials       42       42              

Impacted Files	Coverage Δ
server/plugin/flows.go	0.00% <0.00%> (ø)
server/plugin/plugin.go	5.92% <0.00%> (-0.06%)	⬇️
server/plugin/utils.go	60.16% <100.00%> (+2.22%)	⬆️

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[mickmister]

@hanzei What are the requirements to get this merged? Should some particular functionality be tested or regression tested?

[hanzei]

@mickmister Good question. In order to test this PR, one has to jump through a couple of hoops, namely removing the signature check for the plugin so this build can be installed as part of the onboarding flow.

Once that is done, the PR can be tested. It produces output like this one:
debug [2023-05-22 23:19:30.590 +02:00] OAuth is configured, skipping setup wizard caller="app/plugin_api.go:970" plugin_id=github GitHubOAuthClientID="***8cb3" GitHubOAuthClientSecret="***3d78" UsePreregisteredApplication=false

To me that is enough testing given the complex steps to get there. Are you fine with emerging the PR as it is?

[hanzei]

GitLab PR: mattermost/mattermost-plugin-gitlab#379

[mickmister]

To me that is enough testing given the complex steps to get there. Are you fine with emerging the PR as it is?

LGTM 👍