Custom Authentication Field for connector

[PatchyPenguin]

I have have a service that I'm trying to make a connector for, but I require some additional fields in the authentication window. Can anyone tell me if this is possible? Here's a mock-up of what I want to achieve.

https://imgur.com/a/Wkr20Ro 

[V-lianl-msft]

See if this blog helps you:

https://tsmatz.wordpress.com/2017/11/02/power-bi-data-connector-sdk-oauth-tutorial/ 

Or you can try to include the path in power query

https://docs.microsoft.com/en-us/power-query/handlingauthentication#data-source-paths