Add initial Microsoft Teams support

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

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

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// PrivilegedSignupStatus undocumented
+type PrivilegedSignupStatus struct {
+	// Entity is the base model of PrivilegedSignupStatus
+	Entity
+	// IsRegistered undocumented
+	IsRegistered *bool `json:"isRegistered,omitempty"`
+	// Status undocumented
+	Status *SetupStatus `json:"status,omitempty"`
+}