could you elaborate a bit more on what you mean with “registrate a new Mendix app to Data Hub via OAuth 2.0”.
If you are trying to use our APIs to register a data source, you can generate an API token to authenticate your calls.
I use the Mendix project “Tc_OData_Schema_Generator_2.0” to register Teamcenter Datasets to the Data Hub Catalog.
Here are OAuth credentials necessary. I use for AuthenticationServer “https://login.mendix.com” but for ClientID (The OAuth ID) and ClientSecret (The OAuth secret) ???