Add initial Microsoft Teams support

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

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

@@ -0,0 +1,11 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// WindowsDeviceAzureADAccount undocumented
+type WindowsDeviceAzureADAccount struct {
+	// WindowsDeviceAccount is the base model of WindowsDeviceAzureADAccount
+	WindowsDeviceAccount
+	// UserPrincipalName undocumented
+	UserPrincipalName *string `json:"userPrincipalName,omitempty"`
+}