feat: add debug output for OIDC mapping granted authorities

Author: jornfranke

backend/src/main/java/eu/zuinnote/example/springwebdemo/configuration/SecurityConfigurationOidc.java

@@ -105,7 +105,11 @@ public GrantedAuthoritiesMapper userAuthoritiesMapper() {
                             }
                         }
                     });
-
+            if (this.log.isDebugEnabled()) {
+                for (GrantedAuthority grantedAuthority : mappedAuthorities) {
+                    this.log.debug("Found authority {}", grantedAuthority.getAuthority());
+                }
+            }
             return mappedAuthorities;
         };
     }