Currently, API Management provides users access to APIs based on product subscriptions owned by a user, and each subscription includes properties and a pair of API keys. Microsoft is working on expanding this approach to allow subscriptions and keys to be owned by a group of users, or even to not be associated with any users. This will provide users more flexibility to create an ad-hoc set of keys, or to have keys shared by a team, without having to worry about ownership when members leave or are added to a team.
To vote on this development and share your thoughts, please see More flexible subscriptions in Azure API Management.
Source: Azure Roadmap