Difference between API-KEY and Access Token ?

[Kevin Gordon]

Hi I have a Developer account, access to https://complete.channeladvisor.com, access to the developer console https://api.channeladvisor.com/DeveloperConsole/Account/DevLogin I have created and linked an "application" I have an application secret and application ID, I can see it with "complete" dashboard. I have got an access_token and refresh_token, I have used the documentation procedure to refresh the token, to get a new access_token. However the API here: https://docs.productcatalog.channeladvisor.com/reference/get-model-metadata seems to want an "API KEY" I can't find anything in the documentation that says how to get this, other than contact sup...@channeladvisor.com. Is there a way to self serve to get an API KEY, or is that really the missing part, and I should wait for Support to get back to me. Any pointers or hints would be fantastic, thank you!