added room dependency

app/build.gradle

@@ -30,6 +30,12 @@ android {
 
 dependencies {
 
+    def room_version = "2.2.5"
+
+    implementation "androidx.room:room-runtime:$room_version"
+    annotationProcessor "androidx.room:room-compiler:$room_version"
+
+
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'

app/src/main/java/com/a1/nextlocation/data/Coupon.java

@@ -5,6 +5,7 @@ public class Coupon {
     private String code;
     private String reward;
 
+
     public Coupon(String code, String reward) {
         this.code = code;
         this.reward = reward;