Need support for managed identities for azure

[Sonal240]

Hey 👋 , So, is there a way to connect azure services using managed identities. Incase of google I can see support for service account https://github.com/apache/libcloud/blob/6e39117d6f686e2f49b12fc8a24168d13b6e0ada/libcloud/common/google.py#L542

Also, I see that we are accepting identity as a param, what does it signify? both secret and identity are needed ? https://github.com/apache/libcloud/blob/6e39117d6f686e2f49b12fc8a24168d13b6e0ada/libcloud/common/azure.py#L117

Please pardon me if the solution or any workarounds already exist, thank you!