diff --git a/src/main/java/com/alura/aluraflixapi/controller/authentication/AuthenticationController.java b/src/main/java/com/alura/aluraflixapi/controller/authentication/AuthenticationController.java
index 805e89e..ead70b9 100644
--- a/src/main/java/com/alura/aluraflixapi/controller/authentication/AuthenticationController.java
+++ b/src/main/java/com/alura/aluraflixapi/controller/authentication/AuthenticationController.java
@@ -19,20 +19,22 @@
 @RequestMapping("/login")
 public class AuthenticationController {
 
-    private final AuthenticationManager manager;
+    private final AuthenticationManager authenticationManager;
     private final TokenService tokenService;
 
-    public AuthenticationController(AuthenticationManager manager, TokenService tokenService) {
-        this.manager = manager;
+    public AuthenticationController(AuthenticationManager authenticationManager, TokenService tokenService) {
+        this.authenticationManager = authenticationManager;
         this.tokenService = tokenService;
     }
 
     @PostMapping
     public ResponseEntity<TokenJwtDto> login(@RequestBody @Valid AuthenticationDto dto) {
         log.info("Request to Login user: {}", dto.username());
+        // Object wrapper that contains password and user
         final var authenticationToken = new UsernamePasswordAuthenticationToken(dto.username(),
                 dto.password());
-        final var authentication = this.manager.authenticate(authenticationToken);
+        //authenticationManager compare the password of the request with the password from database.
+        final var authentication = this.authenticationManager.authenticate(authenticationToken);
         final var tokenJWT = tokenService.generateTokenJWT((User) authentication.getPrincipal());
         log.info("Token Generated with Success!");
         return ResponseEntity.ok().body(new TokenJwtDto(tokenJWT));
diff --git a/src/main/java/com/alura/aluraflixapi/infraestructure/security/SecurityConfigurations.java b/src/main/java/com/alura/aluraflixapi/infraestructure/security/SecurityConfigurations.java
index ca9d08e..f09b94e 100644
--- a/src/main/java/com/alura/aluraflixapi/infraestructure/security/SecurityConfigurations.java
+++ b/src/main/java/com/alura/aluraflixapi/infraestructure/security/SecurityConfigurations.java
@@ -49,7 +49,7 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
   }
 
   /**
-   * Crete @Bean AuthenticationManager to authenticate a user
+   * Create @Bean AuthenticationManager to authenticate a user
    * @return AuthenticationManager
    */
   @Bean