Deployment key for team account.
Maybe it will be useful to have a possibility to mark team account SSH key as read-only, and use this key as deployment key for all team repos.
Teams accounts is now used only for grouping users and centralized access management, so commits from team account are become rare thing.
Or, please, provide us other possibility to manage deployment keys for all projects from one place through web interface.
It's not very convenient to use bitbucket API calls for this, because of the need to create dedicated software for this.