Prisma

I’m trying to set up Heroku in a second workspace on my account. When I “Connect to a new Heroku account” I get the error:
```
Heroku account has already been added. Please select it in the heroku account selection.
```
However, my existing heroku account doesn’t appear anywhere in this workspace.

After deleting the initial workspace, it looks like I’m stuck because the old Heroku credentials are still being used, but they’re invalid so I get errors whenever I try to do something with Heroku. I think we need a way to remove Heroku from our workspace/account

Hey Mark, please track this issue: <https://github.com/prismagraphql/prisma-cloud-feedback/issues/172> :slightly_smiling_face: