in-house api: How do I use a cached model for the validateAsync and write endpoints?

Docs: https://support.edifabric.com/hc/en-us/articles/9586899018013-How-to-use-EDI-API-as-ASP-NET-Core
Model Cache: https://support.edifabric.com/hc/en-us/articles/9586899018013-How-to-use-EDI-API-as-ASP-NET-Core#h_01HHHWP840NYSQ7EF2S62XESGC

Hey Yall, im trying to cache a model using in-house api and im unable to get examples to work with the `validateAsync` and `write` endpoints. Neither endpoints allow you to specify the model type.