Boomi Account Connection
To connect your Workspace to a Boomi Account you must collect some information first.
Navigate to Settings -> User Information

Get and note down three parameters: Username, Account ID and API-Token.
The Username is the E-Mail Address you use to login into your Boomi Account.

The ID of the Boomi Account that you want to connect with the Workspace.

Unless your are a Boomi Consultant you have only one Account.
The Platform API-Token used to authenticate requests to the platform API.

You can consider the Token to be a password that is used for "technical" logins. I recommend naming a token after the application that uses it: Boomi Console. If you don't have a Token yet, create a new one - or ask your admin to do it for you!
Be aware: Tokens cannot be revealed. Store your tokens in a safe place.