[Feature Request] WithFmiPath(string pathSuffix)

[bgavrilMS]

MSAL client type

Confidential

Problem statement

FMI tokens, Entra's solution for SPIFEE

Proposed solution

Create a new API on AcquireTokenForClient - WithFmiPath(string pathSuffix). . It shall be experimental for the time being.

Internally, it will do the following.

1. It will add fmi_path={pathSuffix} to the /token request
2. It will change the access token cache key by adding fmi_path to the cache key

We should be able to write integration tests for this. Upon requesting an FMI token, the sub claim will be changed to contain the fmi_path.

THe new API is experimental.

Acceptance test: get an app token with an FMI path and assertr that the sub claim has the FMI path.