issue#406: Simplify management of branding themes

[sergiught]

🔧 Changes

This PR aims at simplifying and improving the management of branding themes following the discussion in #406. As we can only ever have 1 branding theme at the moment, we can check if a default one is set and reuse that ID when creating the theme, triggering an update instead. The read is also changed to check for the default theme instead.

📚 References

• 409 Conflict: There was an error creating branding settings #406

🔬 Testing

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

Base: 85.35% // Head: 85.31% // Decreases project coverage by -0.05% ⚠️

Coverage data is based on head (7d354a3) compared to base (c1817e8).
Patch coverage: 41.66% of modified lines in pull request are covered.

Additional details and impacted files

@@                       Coverage Diff                        @@
##           patch/DXCDT-381-speedy-tests     #504      +/-   ##
================================================================
- Coverage                         85.35%   85.31%   -0.05%     
================================================================
  Files                                76       76              
  Lines                              9899     9892       -7     
================================================================
- Hits                               8449     8439      -10     
- Misses                             1147     1149       +2     
- Partials                            303      304       +1     

Impacted Files	Coverage Δ
internal/auth0/branding/resource_theme.go	96.41% <30.00%> (-0.45%)	⬇️
internal/auth0/branding/data_source_theme.go	100.00% <100.00%> (ø)

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[kaiwen-wang]

How do you get the branding theme id using the web dashboard?

[sergiught]

Hey @kaiwen-wang 👋🏻

You can use any UUID4 as we've improved the DX for managing branding themes considering we can only ever have one, it's unnecessary to retrieve the exact ID.

You can use for example: terraform import auth0_branding_theme.<your-resource-name> <anyUUID: d2ba3db0-7a6d-4da1-9a97-08ab9188f645>.