diff --git a/src/main/java/de/w665/sharepulse/config/SecurityConfig.java b/src/main/java/de/w665/sharepulse/config/SecurityConfig.java
index 1bf48e9..8bceb8d 100644
--- a/src/main/java/de/w665/sharepulse/config/SecurityConfig.java
+++ b/src/main/java/de/w665/sharepulse/config/SecurityConfig.java
@@ -8,6 +8,8 @@ import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configurers.LogoutConfigurer;
 import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.security.web.SecurityFilterChain;
 import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
 
@@ -21,6 +23,12 @@ public class SecurityConfig {
         this.jwtAuthenticationFilter = jwtAuthenticationFilter;
     }
 
+    // This bean is required for Spring Security, though it's not used in this project
+    @Bean
+    UserDetailsService emptyDetailsService() {
+        return username -> { throw new UsernameNotFoundException("no local users, only JWT tokens allowed"); };
+    }
+
     @Bean
     public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
         http