def METHOD_NAME(self):
    teams_user_identifier_model = serialize_identifier(
        MicrosoftTeamsUserIdentifier(
            user_id="teamsid",
            cloud=CommunicationCloudEnvironment.PUBLIC,
            raw_id="someid"
        )
    )
    assert teams_user_identifier_model['microsoft_teams_user']['user_id'] is "teamsid"
    assert teams_user_identifier_model['microsoft_teams_user']['cloud'] is CommunicationCloudEnvironment.PUBLIC
    assert teams_user_identifier_model['raw_id'] is "someid"