I want to use accounts-ui template to add login widgets ({{LoginButton}}) to an app but only using the facebook login bar with accounts-facebook template… Is It possible?
You will probably have to make your own login component to handle that, which allows you to completely customize it as you need. I’ve always found the accounts-ui package quite limiting when you need to do anything special.
Here is a decent tutorial which runs through the steps needed to make a simple login flow with facebook and your own custom components/templates.