How to resolve javax.servlet.ServletException: Circular view path for basic Spring Security? - spring

Question

Im new to Spring Boot and was trying to implement basic Spring Security for a single endpoint in my Spring Boot controller. But I dont know how to resolve the Circular View Error
My Controller
#Controller
#RequestMapping("/api")
public class HelloSecurityController {
#RequestMapping({"/hello"})
public static String helloWorld() {
return "hello";
}
My Security Configurer Class
#EnableWebSecurity
public class SecurityConfigurer extends WebSecurityConfigurerAdapter {
#Autowired
private MyUserDetailsService myUserDetailsService;
#Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(myUserDetailsService);
}
#Bean
public PasswordEncoder passwordEncoder() {
return NoOpPasswordEncoder.getInstance();
}
```
My MyUserDetailsService which returns a simple User with Password
#Service
public class MyUserDetailsService implements UserDetailsService {
#Override
public UserDetails loadUserByUsername(String userName) throws UsernameNotFoundException {
return new User("foo","foo", new ArrayList<>());
The Dependencies I kept in maven pom file during initializing Spring Boot Project
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
The Package structure of my project:
proj_struct
After logging in using the username and password at the login form page generated by spring security Im getting the error:
javax.servlet.ServletException: Circular view path [hello]: would dispatch back to the current handler URL [/api/hello] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
I have not kept any static template (HTML/JSP) in the templates folder. I dont know if I have to as after login I just want to see a simple String. How do I resolve this?