Add initial Microsoft Teams support

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

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

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// DirectoryRole undocumented
+type DirectoryRole struct {
+	// DirectoryObject is the base model of DirectoryRole
+	DirectoryObject
+	// Description undocumented
+	Description *string `json:"description,omitempty"`
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// RoleTemplateID undocumented
+	RoleTemplateID *string `json:"roleTemplateId,omitempty"`
+	// Members undocumented
+	Members []DirectoryObject `json:"members,omitempty"`
+	// ScopedMembers undocumented
+	ScopedMembers []ScopedRoleMembership `json:"scopedMembers,omitempty"`
+}