Sends emails to the list of addresses you provide to the signals in the list you provide using the testing Open Growth Block
Ex: ["name@pubnub.com"] or ["name@pubnub.com", "othername@pubnub.com"]
Current Signals: ["signup", "day3", "day7", "multiplexing", "presence", "uls", "usage", "uuid", "block1day", "block3day", "blockexpired"]
This is necessary for the test to work. Enter only the SILVER (testing) key information