Call CRM API from a native extension

Call CRM API from a native extension

Hello,

we're currently building an extension. One feature of the extension requires us to change the records picture. We'd like to deploy this feature automatically in multiple CRM (thus the extension need)

So far, we managed to accomplish the above feature using two similar solutions (This topic helped us) : 
  1. Create a custom function and use a CRM connector to call the CRM API within the Deluge function
  2. Create an application in the Zoho Developer console and use the access token to make the same request to the API. This time the request is made from a third party server.
We wish to avoid having to use the 2nd (2) solution because we'd need to store all the CRM applications credentials in our database, it would make things more complicated.

What we would like to do instead is exactly the same as (1) but within a custom function that is created in an extension. However, it seems like we can't use the same CRM connector we would use with a classical custom function. To be clear, we need to interact with the CRM that install the extension and not our own CRM.

Is this possible ?

Any help would be greatly appreciated :D