@Hnalwanga8 are you trying to connect a third party router to a Sky connection? Authentication is not done by using account details but can be complex so if you want help explain what service you buy from Sky and the router you want to use and confirm if you are in the UK or Ireland.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
