Shoretie saw action against Young Boys in the group stage.
"It was a dream come true," Shoretire told Versus.
"It's something I have dreamed about ever since I started playing football. There is a big difference between academy football and first team football. There were nerves but I feel like the players and manager really helped me through that experience.
"They made me feel welcomed and looked after me. It was a very proud moment for me. Everyone has their own pathway but at United, we have a lot of ex-players as coaching staff and they understand the game very well.
"They know it's not about rushing. It's about being patient. Seeing the academy players go to the first team happens a lot at a club like this, and it's now considered normal. Each player that makes it through, motivates the next generation of players.
"That then becomes the ambition to motivate those coming after us."