Jesus taught Sola Fide (by faith alone) salvation to Nicodemus. Jesus did not teach him Fide et Paenitentiae (by faith and repentance) salvation. There are folks who say things like:
Repentance is woven into the very fabric of the Gospel of John, though the word itself is never employed. In the account of Nicodemus, for example, repentance was clearly suggested in Jesus’ command to be “born again” (John 3:3-7). 1
Russian proponents of this theology rightly call the position, “Salvation through Lordship,” because it means that faith and repentance are necessary for eternal life. According to this view, the readers should read “repentance” into the text. When we push an idea like this into a text, we call it eisegesis (eis means “into” and egesis kinda means “lead or guide”). We want instead to practice exegesis (ex means “out of” or “from”), which is when we derive ideas from the text.