gistfile1.txt

//this collects my errors 
	if(!$user) {
			// if the user name doesn't exist
			csc_errors()->add('empty_username', __('Invalid username'), 'login');
		}
 
		if(!isset($_POST['csc_user_pass']) || $_POST['csc_user_pass'] == '') {
			// if no password was entered
			csc_errors()->add('empty_password', __('Please enter a password'), 'login');
		}
		
		//stores my errors 
		$errors = csc_errors()->get_error_messages();
		
		//var_dump($errors); dumps an error on my login form, as expected. 
		
		
		
// used for tracking error messages
function csc_errors(){
    static $wp_error; // Will hold global variable safely

    return isset($wp_error) ? $wp_error : ($wp_error = new WP_Error(null, null, null));
}

// displays error messages from form submissions
// function to show errors
function csc_show_error_messages( $error_id = '' ) {
  if( $codes = csc_errors()->get_error_codes() ) {
		echo '<div class="rcp_message error">';
		    // Loop error codes and display errors
		   foreach( $codes as $code ) {
		   		if( csc_errors()->get_error_data( $code ) == $error_id ) {

			        $message = csc_errors()->get_error_message($code);
			        
			        echo '<p class="rcp_error"><span><strong>' . __( 'Error', 'rcp' ) . '</strong>: ' . esc_html( $message ) . '</span></p>';
		    	}
		    }
		echo '</div>';
	}	
}



//in my form I have this

csc_show_error_messages('login');