My friend left me loot in a chest

my friend FirePhantom_YT has left a chest in his house named "this for ShadowIce10" but i dont have trust to the claim so i cant see whats in the chest. i think he wont be playing mc again because he has left all his stuff in a shulker and has placed a sign saying "im going, heres all my stuff". i dont want trust to the claim, i just want to know what he left for me inside that chest and get them if possible. thank you...

heres the location of the house  - 
X: -9253.733
Y: 69.000000
Z: -8353.307