refactor: make sure user is not Blank when using ACMEApi

[MohamadJaara]

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

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What's new in this PR?

Issues

in the logs i see sometimes requests to localhost from acme server and since the logs are obfuscated i was not able to know what is going on

Causes (Optional)

this can result of having a network request with empty string

Solutions

return error when this happen

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Testing

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• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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• If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[yamilmedina]

Great addition, then we can remove now @Suppress("EnforceSerializableFields") 🙌

[github-actions]

Test Results

2 837 tests   2 708 ✔️  26s ⏱️
   485 suites     129 💤
   485 files           0 ❌

Results for commit ab886d8.

♻️ This comment has been updated with latest results.

[datadog-wireapp]

Datadog Report

Branch report: refactor/acme-api-called-with-blank-URL
Commit report: 1954b0a
Test service: kalium-jvm

✅ 0 Failed, 2830 Passed, 123 Skipped, 8m 55.05s Wall Time

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 27.83505% with 70 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (release/candidate@982f616). Click here to learn what that means.

Additional details and impacted files

@@                 Coverage Diff                  @@
##             release/candidate    #2637   +/-   ##
====================================================
  Coverage                     ?   58.33%           
  Complexity                   ?        7           
====================================================
  Files                        ?     1177           
  Lines                        ?    46159           
  Branches                     ?     4383           
====================================================
  Hits                         ?    26928           
  Misses                       ?    17272           
  Partials                     ?     1959           

Files	Coverage Δ
.../com/wire/kalium/logic/data/e2ei/E2EIRepository.kt	78.53% <50.00%> (ø)
...lium/network/api/base/unbound/acme/ACMEResponse.kt	41.79% <31.70%> (ø)
...re/kalium/network/api/base/unbound/acme/ACMEApi.kt	24.19% <24.07%> (ø)

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