Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// SharingInvitation undocumented
+type SharingInvitation struct {
+	// Object is the base model of SharingInvitation
+	Object
+	// Email undocumented
+	Email *string `json:"email,omitempty"`
+	// InvitedBy undocumented
+	InvitedBy *IdentitySet `json:"invitedBy,omitempty"`
+	// RedeemedBy undocumented
+	RedeemedBy *string `json:"redeemedBy,omitempty"`
+	// SignInRequired undocumented
+	SignInRequired *bool `json:"signInRequired,omitempty"`
+}