ELI5 How to Access Business Central Web Services/API with Oauth 

Thanks, and yes, I have created several OAuth videos to help people transition from Basic to OAuth authentication.

@@Hougaard Using a theme park to explain OAuth2 is a very good idea. It might be even better if you also refer to Disneyland :)

But then you'll need permission to perform that API call, isn't that an endless circle now?

@@Hougaard The idea being: Log in as an admin user trough azure to business central (only once to perform the add) -> add the application user in business central trough an API call so later that application user can be used to query the data in business central. I could not find any API documentation in the Microsoft documentation for adding an Application User like the one you create in the video. Could you also point me to that?

Yeah, "Entra" is now the thing :)

called Entra apps now

@@Hougaard Thank you.

Yes, what platform do you use?

learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/api-reference/v2.0/endpoints-apis-for-dynamics

@@Hougaard Thank you for the response

No.

Hvor vil du bruge APIer fra?

@@Hougaard jeg ville bruge postman og jeg har fundet ud af det💪🏽🙌🏽

Then the bad request is probably your content or query string

@@Hougaard I found the issue. its that I was missing SUPER (Data) Permission. For Standard Pages it was working fine without SUPER (Data), but for custom pages it is required.

You should be able to take the c# example and just translate that to regular javascript

@@Hougaard Thank you so much for this tutorial, it's highly appreciated. I would love to ask you how can I use AL codeunit to consume a third party rest api and generate access token to be used on the bearer

From an API, muse the PATCH http method.

@@Hougaard try to update purchaseInvoices, using client.PatchAsync(URL2, Content), the error message return BadRequest or MethodNotAllowed .

{ "error": { "code": "BadRequest_InvalidToken", "message": "Could not validate the client concurrency token required by the service. Please provide a valid token in the client request. CorrelationId: 0ad47bd7-12d7-48ac-baba-7b1b716e27b6." } }

In order to update field, tip Headers key: "If-Match" Value: "*"

Seems to be a better example...