Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/DirectoryObjectModel.go

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// DirectoryObject Represents an Azure Active Directory object. The directoryObject type is the base type for many other directory entity types.
+type DirectoryObject struct {
+	// Entity is the base model of DirectoryObject
+	Entity
+	// DeletedDateTime undocumented
+	DeletedDateTime *time.Time `json:"deletedDateTime,omitempty"`
+}