Add initial Microsoft Teams support

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

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

@@ -0,0 +1,29 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// Invitation undocumented
+type Invitation struct {
+	// Entity is the base model of Invitation
+	Entity
+	// InvitedUserDisplayName undocumented
+	InvitedUserDisplayName *string `json:"invitedUserDisplayName,omitempty"`
+	// InvitedUserType undocumented
+	InvitedUserType *string `json:"invitedUserType,omitempty"`
+	// InvitedUserEmailAddress undocumented
+	InvitedUserEmailAddress *string `json:"invitedUserEmailAddress,omitempty"`
+	// InvitedUserMessageInfo undocumented
+	InvitedUserMessageInfo *InvitedUserMessageInfo `json:"invitedUserMessageInfo,omitempty"`
+	// SendInvitationMessage undocumented
+	SendInvitationMessage *bool `json:"sendInvitationMessage,omitempty"`
+	// InviteRedirectURL undocumented
+	InviteRedirectURL *string `json:"inviteRedirectUrl,omitempty"`
+	// InviteRedeemURL undocumented
+	InviteRedeemURL *string `json:"inviteRedeemUrl,omitempty"`
+	// Status undocumented
+	Status *string `json:"status,omitempty"`
+	// ResetRedemption undocumented
+	ResetRedemption *bool `json:"resetRedemption,omitempty"`
+	// InvitedUser undocumented
+	InvitedUser *User `json:"invitedUser,omitempty"`
+}