Yes. When you connect your Cloud, Bunnyshell will manage only newly created Servers through the Bunnyshell platform. The resources are uniquely identified by Tags, so no existing resources are touched.
Virtual Networks on the other hand are imported to Bunnyshell and can be used with Bunnyshell Servers. You can always choose to create new Virtual Networks from Bunnyshell, so that you don't mix infrastructures.
You can reconnect your cloud by clicking on the top right Cloud Circle and Click Connect Accounts. Choose the Cloud Provider you want to connect and reconnect with your new credentials.
Bunnyshell only imports your Virtual Networks. Other resources such as servers, disks or security groups are not imported or used.
Follow the steps described in Connect your AWS Cloud Account.
Follow the steps described in Connect your Azure Cloud Account.
Follow the steps described in Connect your Azure Stack Account.
Follow the steps described in Connect your Digital Ocean Cloud Account.
No. Bunnyshell does not support this at the moment. Please use another account in order to do this.