Neo4j Key in Azure

Hello everyone,

I created a neo4j Instance in Azure, which delivers the enterprise version. I downloaded the bloom plugin and I want to install it. What I haven´t found out is how do I get the activation key file. In the documentation, it is stated that it´s necessary, yet I haven´t found anything on how to retrieve it.
Also on another note, I don´t get the licensing thing. I have the enterprise version on the azure instance do I need to get an extra license for bloom?

Thanks and Greetings