Instantiates a new handler.
The DOM element to contain the handler
The step to handle
The deferred Promise that resolves the step when it's ready to submit.
The step to handle
The DOM element to contain the handler
Initializes the handler and returns a Promise that will resolve with the complete step when it's ready to submit.
Helper for locating a DOM element within the target.
Render the handler's template to the target.
Displays a retry message and enables the submit button.
Handler that renders inputs for username and password in an Express step, as well as inputs for each optional attribute being collected.