[FEATURE REQUEST] Custom Connectors with client credentials OAuth

Type of Connector

Custom Connector

Name of Connector

Custom Connectors

Is your feature request related to a problem? Please describe.

As a follow up to #225.

Currently it is impossible to use client_credentials in the OAuth definition for Custom Connectors. This issue has been around a while see the Power Automate Idea from 5 years ago.

It would be great if we could integrate PowerAutomate into our system using a "Service Connection", one authorized connection all Flows can share without any User logging in, as I understand it, that is what the client_credentials is for. In the Swagger editor we can see the different flows available:

• implicit
• password
• application
• accessCode

It seems impossible to change this and save the Custom Connection, in addition client_credentials is missing from this list.

Describe the solution you'd like

An additional dropdown in the OAuth section of the Custom Connector Security tab, where we can accurately update the information for each one of the flows available as well as adding the client_credentials flow

Describe alternatives you've considered

• Users logging in for each flow doesn't really work for us at the moment
• We are considering a "simple" API key solution for now, but we are not a fan

Additional context

N/a

No files, tests, or code entry points are identified in the issue. Start by reviewing follow-up issue #225 and the Custom Connector Security tab behavior described here; done means supporting client_credentials and allowing the listed OAuth flows to be configured and saved.