Set WP_User role from Auth0

functions.php

<?php

// =============================================================================
// AUTH0 CONFIG
// =============================================================================
function auth0_docs_hook_auth0_user_login( $user_id, $userinfo, $is_new, $id_token, $access_token, $refresh_token ) {
  
  // Save role from $userinfo object
  $wpRole = $userinfo['app_metadata']['wordpress_role'];
  // $wpRole = $userinfo => app_metadata => wordpress_role;
  
  // Fetch the WP_User object of our user.
  $u = new WP_User( $user_id );
  
  // Update WP_User with Auth0 Role
  if($wpRole == "member") {
    
    $u->set_role( 'member' );
    
    header("Location: https://wordpress-265436-947651.cloudwaysapps.com/member-dashboard/");
    header("Connection: close");
    exit(0); // Optional, prevents any accidental output
    
  } elseif ($wpRole == "vendor") {
    
    $u->set_role( 'vendor' );
    
    header("Location: https://wordpress-265436-947651.cloudwaysapps.com/vendor-dashboard/");
    header("Connection: close");
    exit(0); // Optional, prevents any accidental output
    
  } elseif ($wpRole == "teacher") {
    
    $u->set_role( 'teacher' );
    
    header("Location: https://wordpress-265436-947651.cloudwaysapps.com/teacher-dashboard/");
    header("Connection: close");
    exit(0); // Optional, prevents any accidental output
    
  } elseif ($wpRole == "designer") {
    
    $u->set_role( 'designer' );
    
    header("Location: https://wordpress-265436-947651.cloudwaysapps.com/designer-dashboard/");
    header("Connection: close");
    exit(0); // Optional, prevents any accidental output
    
  }

  // SAMPLE CODE
  echo '<strong>WP user ID</strong>:<br>' . $user_id . '<hr>';
  echo '<strong>Auth0 Role</strong>:<br>' . $wpRole . '<hr>';
  echo '<strong>Auth0 user info</strong>:<br><pre>' . print_r( $userinfo, true ) . '</pre><hr>';
  echo '<strong>Added to WP DB?</strong>:<br>' . ( $is_new ? 'yep' : 'nope' ) . '<hr>';
  echo '<strong>ID Token</strong>:<br>' . ( $id_token ? $id_token : 'not provided' ) . '<hr>';
  echo '<strong>Access Token</strong>:<br>' . ( $access_token ? $access_token : 'not provided' ) . '<hr>';
  echo '<strong>Refresh Token</strong>:<br>' . ( $refresh_token ? $refresh_token : 'not provided' ) . '<hr>';
  wp_die( 'Login successful! <a href="' . home_url() . '">Home</a>' );
  
}
add_action( 'auth0_user_login', 'auth0_docs_hook_auth0_user_login', 10, 6 );