You understood me correctly the first time. Maybe I wasn't clear enough in my reply. What I meant is why would user trust me if my app is asking them for their Moodle username and password. I could do anything with it. I know Moodle doesn't store that information but I will have a tough time making my users believe that I am also not storing their credential but just asking it for Web services token.
General help
Make Moodle OAuth issuer
This discussion has been locked so you can no longer reply to it.