who wrote the lyrics of this track?
Howard Ashman
Evermore (Beauty and the Beast song)
In the animated film, the Beast barely sings because Menken and original "Beauty and the Beast" lyricist Howard Ashman 
who sang forevermore in beauty and the beast Originally recorded for the film by Dan Stevens
wiki:10002590
Evermore (Beauty and the Beast song) [SEP] Introduction
"Evermore" is a song written by composer Alan Menken and lyricist Tim Rice for the musical fantasy film "Beauty and the Beast" (2017), a live-action remake of Disney's 1991 animated film of the same name. Originally recorded for the film by English actor Dan Stevens, who performs the song in his starring role as the titular Beast, "Evermore" was first released as a single by American singer Josh Groban on March 3, 2017. Stevens' version became available on March 10, 2017 when the film's soundtrack was released online, while Groban's cover is played during the film's closing credits. In the animated film, the Beast barely sings because Menken and original "Beauty and the Beast" lyricist Howard Ashman had not been able to determine a moment in the film during which it would have been appropriate for the character to perform his own song.