Add log for auth

src/main/java/com/olympus/hermione/security/controllers/AuthController.java

@@ -1,6 +1,9 @@
 package com.olympus.hermione.security.controllers;
 
 import java.util.Map;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.oauth2.jwt.Jwt;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
@@ -12,6 +15,7 @@ import com.olympus.hermione.security.services.JwtService;
 @RequestMapping("/msauth")
 public class AuthController {
 
+    private static final Logger logger = LoggerFactory.getLogger(AuthController.class);
 
     private final JwtService jwtService;
 
@@ -21,6 +25,11 @@ public class AuthController {
 
     @PostMapping("/exchange")
     public ResponseEntity<?> exchangeToken(@AuthenticationPrincipal Jwt azureJwt) {
+        if (azureJwt == null) {
+            logger.info("azureJwt is null! Authentication failed.");
+            return ResponseEntity.status(401).body(Map.of("error", "Invalid or missing JWT"));
+        }
+        logger.info("Received JWT: " + azureJwt.getTokenValue());
         String internalToken = jwtService.generateInternalToken(azureJwt);
         return ResponseEntity.ok(Map.of("token", internalToken));
     }