spring-boot-rest/spring-security-modules/spring-security-mvc-boot-1/src/main/java/com/baeldung/security/AppUserPrincipal.java

package com.baeldung.security;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import com.baeldung.models.AppUser;

public class AppUserPrincipal implements UserDetails {

    private final AppUser user;

    //

    public AppUserPrincipal(AppUser user) {
        this.user = user;
    }

    //

    @Override
    public String getUsername() {
        return user.getUsername();
    }

    @Override
    public String getPassword() {
        return user.getPassword();
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        final List<GrantedAuthority> authorities = Collections.singletonList(new SimpleGrantedAuthority("User"));
        return authorities;
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }

    //

    public AppUser getAppUser() {
        return user;
    }

}