Put temp.delete inside ensure block

src/invidious/user/imports.cr

@@ -298,6 +298,7 @@ struct Invidious::User
             # Ensure max size of 4MB
             io_sized = IO::Sized.new(file_io, 0x400000)
 
+            begin
               temp = File.tempfile(".db") do |tempfile|
                 begin
                   File.write(tempfile.path, io_sized.gets_to_end)
@@ -321,7 +322,9 @@ struct Invidious::User
                   Invidious::Database::Users.update_subscriptions(user)
                 end
               end
-            temp.delete
+            ensure
+              temp.delete if !temp.nil?
+            end
           end
         end
       end