Support for Multiple Custom Domains

[duedares-rvj]

🔧 Changes

1. resource/auth0_custom_domain: Instead of returning only the default and singular custom_domain present for the domain, the data_source now takes custom_domain_id as input and fetches details for the same.
2. data_source/auth0_custom_domain: Added support to set domain_metadata and retrieve read-only fields like verification and certificate

resource "auth0_custom_domain" "my_custom_domain" {
  domain     = "domain.auth.tempdomain.com"
  type       = "auth0_managed_certs"
  tls_policy = "recommended"
  domain_metadata = {
    key1 : "value1"
    key2 : "value2"
  }
}
data "auth0_custom_domain" "test" {
  custom_domain_id = auth0_custom_domain.my_custom_domain.id
}

📚 References

🔬 Testing

Updated and re-recorded all relevant test-cases.

📝 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)

[kushalshit27]

Update to go-auth0 released version before merge

[kushalshit27]

LGTM!

[kushalshit27]

Is it breaking change for existing users if they update the provider ?

[duedares-rvj]

Is it breaking change for existing users if they update the provider ?

Yeah, that was a major concern we had while implementation. But I believe we have handled all cases to ensure there is no breaking change on existing customer. Let me know if you find any flow where it might be of an impact. Thanks!