You have to put the parameters required to connect to your solution in the method getFieldsLogin.
For example, if you need an url and an APIkey you can create this method :
Code available in the file <Myddleware>/src/Myddleware/RegleBundle/Solutions/shopapplication.php
If the field you need doesn’t exit in the language file <myddlware>/src/Myddleware/RegleBundle/Resources/translations ($solution->field), you can add its translation here.
Now, click on Connector->Creation, then select your application, the parameters you have added in your function should be visible :
We will now develop the login function.