add user conv impl

utils command.txt

@@ -1,3 +1,7 @@
+docker build -t rust-api:1.0.5 .
+docker save -o rust-api-1-0-4.tar rust-api:1.0.4
+
+
 cross build --release --target aarch64-unknown-linux-gnu
 
 docker run -p 8080:8080 \
@@ -36,6 +40,13 @@ linux distro
   -p 8080:8080 `
   rust-api:1.0.2
 
+docker run \
+--name hotel-api-2 \
+-e JWT_SECRET=your_jwt_secret_key \
+-v "/var/lib/hotel-api/db:/app/db" \
+-p 8080:8080 \
+rust-api:1.0.3
+