Changed method and variable name in UserService.java

Changed name of method and parameter name from loadUserByName and name to loadUserByUsername and username

FullstackProsjekt/src/backend/main/java/edu/ntnu/idatt2105/service/UserService.java

@@ -33,8 +33,8 @@ public class UserService implements UserDetailsService {
             userRepository.findByPassword(user.getPassword()).isPresent();
   }
 
-  public User findAppUserByName(String name) {
-    Optional<User> userOptional = userRepository.findByUsername(name);
+  public User findAppUserByUsername(String username) {
+    Optional<User> userOptional = userRepository.findByUsername(username);
 
     return userOptional.orElse(null);
   }