Why I can't access to field class using reflection?

I use java spring for my project. I try to access the property and set it with a specific value using the reflection.

I try to access the name property of User class:

@Data
public class User {
    @Id
    private String id;
    private String name;
    private String phone;
    private String email;
}

Here how I try to access the name field:

User newUser = userRepository.get(id); 
User user = accessProp(newUser, User.class, "name", "John");


public <D> D accessProp(Class<D> dest, String fieldName, Object value ){
    Field filed = null;
    var cls = AdminUser.class;

    filed = cls.getField(fieldName);
    filed.set(dest, value);

    return dest;
}

But on this row:

 filed = cls.getField(fieldName);
 

I get this error:

 java.lang.NoSuchFieldException: name
 

My question is why "name" field not found?