Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// TimeOffRequestObject undocumented
+type TimeOffRequestObject struct {
+	// ScheduleChangeRequestObject is the base model of TimeOffRequestObject
+	ScheduleChangeRequestObject
+	// StartDateTime undocumented
+	StartDateTime *time.Time `json:"startDateTime,omitempty"`
+	// EndDateTime undocumented
+	EndDateTime *time.Time `json:"endDateTime,omitempty"`
+	// TimeOffReasonID undocumented
+	TimeOffReasonID *string `json:"timeOffReasonId,omitempty"`
+}