Use case for multiple login option

Question

I have a use case where user may log in via normal login, as well as social login such as Twitter, Google, Facebook. I draw the use case as below but not sure if it is correct.<

Answer 1

The <> works vice versa.

I'm quite tired telling this all the time, but Login account is not a use case. It does not deliver any value to an actor. It is a simple constraint which applies to other real use cases.

Further: avoid the use of <>/<>. They are a sign of functional analysis you are trying to do with your use cases. Instead use cases are synthesized which makes a big difference. If your use case diagrams start resembling a spider's web your design is broken.

Recommended read: Bittner/Spence.