One click "Login with Facebook" for Android application without asking about username and password when Facebook is on a smartphone installed and user is logged into Facebook. NOTE: It should be done in Delphi 10.1
Please don't waste my and your time when you don't know what Delphi 10.1 is.
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Witaj. I know something about XE 10.1 :-) I think i will be able to help you. Will be waiting for your answer. We can agree about price and cooperation