Mypy error | TypedDict incompatible with a Mapping

[mjafferi-msft]

• Package Name: azure-communication-identity (_shared folder)
• Python Version: 3.7

Describe the bug

On the basis of raw_id, different Communication Identifiers are created and returned such as PhoneNumberIdentifier, MicrosoftTeamsUserIdentifier, MicrosoftBotIdentifier and so on.
Running mypy command, gives below error :

azure\communication\identity\_shared\models.py:320: error: Incompatible return value type (got "PhoneNumberIdentifier", expected "CommunicationIdentifier")  [return-value]
azure\communication\identity\_shared\models.py:320: note: Following member(s) of "PhoneNumberIdentifier" have conflicts:
azure\communication\identity\_shared\models.py:320: note:     kind: expected "Union[CommunicationIdentifierKind, str, None]", got "CommunicationIdentifierKind"
azure\communication\identity\_shared\models.py:320: note:     properties: expected "Mapping[str, Any]", got "PhoneNumberProperties"

The protocol defined doesn't works for these types. Each identifier has a unique TypedDict which is incompatible with a Mapping (as described here : python/mypy#4976).

Creating this issue to look at the protocol and figure out the solution for this.