Add initial Microsoft Teams support

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

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

@@ -0,0 +1,11 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// APIServicePrincipal undocumented
+type APIServicePrincipal struct {
+	// Object is the base model of APIServicePrincipal
+	Object
+	// ResourceSpecificApplicationPermissions undocumented
+	ResourceSpecificApplicationPermissions []ResourceSpecificPermission `json:"resourceSpecificApplicationPermissions,omitempty"`
+}