Created task 02.

task02/src/main/java/de/hftstuttgart/vs/task02/Main.java

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+package de.hftstuttgart.vs.task02;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import io.javalin.Javalin;
+
+public class Main {
+
+    /**
+     * Record that represents a user.
+     *
+     * @param id find a better type the object (There are multiple solutions)
+     * @param firstName first name of user
+     * @param lastName last name of user
+     */
+    public record User(Object id, String firstName, String lastName) {}
+
+    /**
+     * Why do we need a synchronized list?
+     */
+    private final List<User> users = Collections.synchronizedList(new ArrayList<>());
+
+    /**
+     * Develop a rest api which can execute the following tasks:
+     * - get a list of all users (return empty array if there is no user stored)
+     * - return a single user by their id (return 404 if user doesn't exist)
+     * - create a new user (return the correct http status)
+     *
+     * Beside developing the functionalities you should also define the endpoints.
+     *
+     * Further Information about http status codes: https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
+     *
+     * @param args can be ignored
+     */
+    public static void main(final String[] args) {
+        final var app = Javalin.create()
+                .start(7070);
+
+        app.get("/", ctx -> ctx.json(new User("test_id", "Max", "Mustermann")));
+    }
+
+
+}

task02/src/test/java/de/hftstuttgart/vs/task02/MainTest.java

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+package de.hftstuttgart.vs.task02;
+
+import static io.restassured.RestAssured.given;
+
+import org.junit.jupiter.api.Test;
+
+class MainTest {
+
+    //TODO: Change path (and maybe the http method)
+    @Test
+    void getAllUsers() {
+        given()
+                .log().all()
+                .port(7070).
+        when().
+                get("").
+        then().
+                log().all();
+    }
+
+    //TODO: Change path (and maybe the http method)
+    @Test
+    void getSpecificUser() {
+        given()
+                .log().all()
+                .port(7070).
+        when().
+                get("").
+        then().
+                log().all();
+    }
+
+    //TODO: Change path (and maybe the http method)
+    @Test
+    void addUser() {
+        given()
+                .log().all()
+                .port(7070).
+        when().
+                get("").
+        then().
+                log().all();
+    }
+
+}