Most automations make use of API's to other systems to send and receive data. The systems may require you to enter information like a username and password in order that the APIANT system can send and receive data to those other systems.
The APIANT system stores the connection information encrypted in the system's database.
The Connections menu at top right lets you access and manage all of your app connections:
Each app may have more than one named connection. The first connected account is always named "Default".