Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// OptionalClaim undocumented
+type OptionalClaim struct {
+	// Object is the base model of OptionalClaim
+	Object
+	// Name undocumented
+	Name *string `json:"name,omitempty"`
+	// Source undocumented
+	Source *string `json:"source,omitempty"`
+	// Essential undocumented
+	Essential *bool `json:"essential,omitempty"`
+	// AdditionalProperties undocumented
+	AdditionalProperties []string `json:"additionalProperties,omitempty"`
+}