Add connection validation

[hypnoglow]

for now, this is for demonstration and discussion. see related issue

Ref: #42

[alexkappa]

Hi @hypnoglow, sorry for the late reply. Thanks for taking a stab at this! I will take a look and share my feedback very soon.

[alexkappa]

@hypnoglow could you also add a test using these fields?

[alexkappa]

@hypnoglow ping!

[hypnoglow]

Hi @alexkappa, sorry for the delay.

Added the test, but I don't get why it fails with * auth0_connection.my_connection_with_validation: 400 Bad Request: Payload validation error: 'Invalid value "{params[0]}"' on property options.passwordPolicy (Password strength level)..

[alexkappa]

Not sure exactly what's the issue, this is an error from the auth0 api. I would recommend adding some log.Printf()'s to print your payloads (i.e. Connection) and running TF_LOG=1 terraform apply.

You can see the provider logs prefixed with plugin.terraform-provider-auth0.

We also support debugging info directly by the go-auth0 library with the AUTH0_DEBUG=1 flag but I haven't tested this myself.

[alexkappa]

Any luck with this @hypnoglow ? I can also give it a go if you don't mind.

The TF_LOG=DEBUG AUTH0_DEBUG=1 terraform apply will print out the requests/responses so it might help with the error (its an error from the auth0 management api). Its not the most descriptive error message, perhaps we could give them this feedback as I've come across the same and its difficult to debug.

[hypnoglow]

That problem gone, it seems it was not introduced by this PR though.

Also, I replaced buildConnectionValidation with your new List(MapData(m), .... Not sure how to replace readConnectionValidation, haven't found any similar logic in readConnection function.

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