Merge branch 'master' of github.com:mattermost/mattermost-server into MM-50966-in-product-expansion-backend

server/channels/einterfaces/cloud.go

@@ -48,4 +48,5 @@ type CloudInterface interface {
 	CheckCWSConnection(userId string) error
 
 	SelfServeDeleteWorkspace(userID string, deletionRequest *model.WorkspaceDeletionRequest) error
+	SubscribeToNewsletter(userID string, req *model.SubscribeNewsletterRequest) error
 }