Add ability to manage an App's Team members via API

Description of the feature request

It would be helpful if there was a way to add/remove team members from a given app in bitrise via the API

Use case / for what or how I would use it

We run an app-building service and then pipe the completed files across to bitrise to compile and test/submit to app stores. We need to constantly add clients into bitrise as team members so that they can connect their accounts and upload their certs. With the ability to manage team members via the API we’d be able to streamline this process and have all the required access setup at the same time our scripts create the app in bitrise

Thanks for the #feature-request, please don’t forget to vote for it!