Reference
How to find your purchase code you can find in the following article:
https://help.market.envato.com/hc/en-us/articles/202822600-Where-Is-My-Purchase-Code-
Note
We don’t receive your API Key upon activation, it is used 1 time, during a request to the Envato API, after which the data is deleted.
What is an API Key?
An API Key is a security token that you can use to authenticate with our API. It is a secret, like a password, that should be protected. You can create more than one token. You should consider creating a different token for different access uses.
To activate your theme you need the API Key, how to get it is described in the following points:
- Go to https://build.envato.com/create-token/.
- Choose a token name.
- Then, click Create Token.