AuthenticationService

[AL-CHALABEE]

Hi Chandu, thank you for this lightweight and straightforward implementation!
I'm new to CQRS, and throughout my reading,s I understood that logic needs to be implemented on the Handler, in your implementation what is the rationale behind implementing LoginAsync in AuthenticationService then calling it on the LoginHandler wouldn't be easier to move the implementation of LoginAsyc directly under the LoginHandler and give up the AuthenticationService?