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In this example I have a main Login use case which will call the use case, "Account Verification". In this scenario, I feel Register would need to be detailed in a Use Case Scenario document but would Account Verification, Login Error: Account Authentication Failed & Log User Activity require a Use Case Scenario to be written since these are not use cases the User would directly interact with?

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Krellex
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  • THat's a traditional debate in this community: Login is not a use case: it's no added value for the user, just a constraint for using the system. I'll not answer this founded questing, since a lot of other answers explain this with more or less details), e.g. https://stackoverflow.com/q/53907281/3723423 or https://stackoverflow.com/questions/35651397/include-login-in-uml-use-case. The UCD is not a flow diagram that shows the flow of activities in the sytem. If you want to model flows, consider using activity diagrams. – Christophe Oct 17 '21 at 10:14
  • (by the way, congratulations for your hard work and in-depth studying of use cases - a lot of interesting questions) – Christophe Oct 17 '21 at 10:17
  • Thanks for the reply and linking the other answers. Those do seem to clear things up a lot more! Thanks! – Krellex Oct 17 '21 at 10:43

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