[Added] Tests and some more functionality to the Services

backend/src/main/java/com/ninjaws/quiz/models/ApiResponse.java

@@ -0,0 +1,21 @@
+package com.ninjaws.quiz.models;
+
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import lombok.Getter;
+import lombok.Setter;
+
+
+/**
+ * The response sent by the external API
+ */
+@Getter
+@Setter
+public class ApiResponse {
+    @JsonProperty("response_code")
+    private int responseCode;
+    @JsonProperty("results")
+    private List<Question> results;
+}