How to automate the POST method in Rest Assured?

@Test(description = "Automate POST method and validate response")
public void methodValidationPOST() throws IOException, ParseException {

    FileInputStream file = new FileInputStream(
        new File(System.getProperty("user.dir") + "\\TestData\\post.json")
    );

    Response resp = given()
                        .header("Content-Type", "application/json")
                        .body(IOUtils.toString(file, "UTF-8"))
                        .when()
                        .post("https://reqres.in/api/users");

    assertEquals(resp.getStatusCode(), 201);
    assertEquals(resp.path("job"), "tester");
}

@Test
public void postWithInlineBody() {

    String requestBody = "{ \"name\": \"John\", \"job\": \"QA Engineer\" }";

    given()
        .contentType(ContentType.JSON)
        .body(requestBody)
        .when()
        .post("https://reqres.in/api/users")
        .then()
        .statusCode(201)
        .body("name", equalTo("John"))
        .body("job", equalTo("QA Engineer"));
}

// POJO class
public class User {
    private String name;
    private String job;
    // getters/setters
}

@Test
public void postWithPOJO() {
    User user = new User();
    user.setName("Jane");
    user.setJob("SDET");

    given()
        .contentType(ContentType.JSON)
        .body(user)  // serialized to JSON automatically
        .when()
        .post("https://reqres.in/api/users")
        .then()
        .statusCode(201);
}