create a connector like key Vault connector as a Microsoft connector.

Question

We have a service want to create it as a connector like key vault connector, which can provide it to customer directly and use managed identity easily.

I found it hard to use the custom connector, because the auth type is little out of date, for example, we are not allowed use client cert in our sub, it's a must-have in custom connector.

So, what should I do if I want to build a first party connector? Thanks.