Add initial Microsoft Teams support

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

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

@@ -0,0 +1,25 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// UserEmailSource undocumented
+type UserEmailSource int
+
+const (
+	// UserEmailSourceVUserPrincipalName undocumented
+	UserEmailSourceVUserPrincipalName UserEmailSource = 0
+	// UserEmailSourceVPrimarySMTPAddress undocumented
+	UserEmailSourceVPrimarySMTPAddress UserEmailSource = 1
+)
+
+// UserEmailSourcePUserPrincipalName returns a pointer to UserEmailSourceVUserPrincipalName
+func UserEmailSourcePUserPrincipalName() *UserEmailSource {
+	v := UserEmailSourceVUserPrincipalName
+	return &v
+}
+
+// UserEmailSourcePPrimarySMTPAddress returns a pointer to UserEmailSourceVPrimarySMTPAddress
+func UserEmailSourcePPrimarySMTPAddress() *UserEmailSource {
+	v := UserEmailSourceVPrimarySMTPAddress
+	return &v
+}