A connection enables Fusio to connect to other remote sources. This can be i.e. a database or message queue server. Please take a look at the adapter to see a list of all available connections. It is also easy possible to develop your own custom connection.
To develop a custom connection you need to create a class which implements the
Fusio\Engine\ConnectionInterface. Then you can add this class to the
provider.php file. Thus it is possible to select this connection at the backend.