I'd pick 1) because the program is accessing a system (in vs. on), and "log in" is the action, whereas "to" begins the prepositional phrase. So, ... ... <看更多>

快來到新竹巨城LOG-ON的毛穴撫子日本神社來感受秋天氣息吧 … ... LOG-ON都貼心設想好了特別引進專屬客製化Party Pack派對懶人包 ... <看更多>

https://stackoverflow.com/questions/406016/ui-terminology-logon-vs-login https://writingexplained.org/log-in-or-log-on-difference. ... <看更多>

Log into your personal or business account · Open the Pinterest app · Enter your email address and hit Continue, then enter your password and tap Log in. You can ... ... <看更多>