All of your account information, including which spaces you have access to, is shown on the Developer Portal after you login.
To create a new account, simply log in to the Developer portal here.
You will also have to have separate logins for each new private space you have access to.
You must create your Owner ID before continuing to use Iotic Space. It is a 32-digit ID which identifies you everywhere. All of your Things and Agents are associated with your Owner ID.
You will automatically be provided with free access to the Community Space. If you have been offered access to another public or private space, you will need your Owner ID to link it to your account.