Simple use case work. Digital bank and credit card financial system.
The idea is to create an online account through an app (mobile app) without having to go to a physical agency. The user enters the data in the App and performs the registration, after the registration the analyst authenticates. For the customer to register or make transactions, you need analyst authentication (bank employee).
The specifications of use cases, the UC1 for example is obligatory to start with the registration?
For example:
UC1 - Registering
Description: The customer can register through the system interface.
Preconditions: Internet connection required;
Postconditions: "Successful signup" message.
Lead Actor: Client ...
Note: Consider dotted arrow.
The diagram is also not sure if it is right.