Perform prompting for a [classPrompt].
This function is called by other parts of this library to handle prompts for the various actions that can require prompting.
Override the Service [vfuncService.prompt_async] virtual method to change
the behavior of the propmting. The default behavior is to simply run [methodPrompt.perform] on the prompt.
| this |
the secret service |
| prompt_path |
the D-Bus object path of the prompt |
| return_type |
the variant type of the prompt result |
| cancellable |
optional cancellation object |
| callback |
called when the operation completes |
| user_data |
data to be passed to the callback |