Add initial Microsoft Teams support

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

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

@@ -0,0 +1,31 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// ItemActivityStat undocumented
+type ItemActivityStat struct {
+	// Entity is the base model of ItemActivityStat
+	Entity
+	// StartDateTime undocumented
+	StartDateTime *time.Time `json:"startDateTime,omitempty"`
+	// EndDateTime undocumented
+	EndDateTime *time.Time `json:"endDateTime,omitempty"`
+	// Access undocumented
+	Access *ItemActionStat `json:"access,omitempty"`
+	// Create undocumented
+	Create *ItemActionStat `json:"create,omitempty"`
+	// Delete undocumented
+	Delete *ItemActionStat `json:"delete,omitempty"`
+	// Edit undocumented
+	Edit *ItemActionStat `json:"edit,omitempty"`
+	// Move undocumented
+	Move *ItemActionStat `json:"move,omitempty"`
+	// IsTrending undocumented
+	IsTrending *bool `json:"isTrending,omitempty"`
+	// IncompleteData undocumented
+	IncompleteData *IncompleteData `json:"incompleteData,omitempty"`
+	// Activities undocumented
+	Activities []ItemActivity `json:"activities,omitempty"`
+}