You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: accessTokens.go
    path of file: ./repos/owncast/utils
    
    the code of the file until where you have to start completion: package utils

import (
	"crypto/rand"
	"encoding/base64"
)

const tokenLength = 32

// GenerateAccessToken will generate and return an access token.
func GenerateAccessToken() (string, 
    
func generateRandomBytes(n int) ([]byte, error) {
	b := make([]byte, n)
	_, err := rand.Read(b)
	// Note that err == nil only if we read len(b) bytes.
	if err != nil {
		return nil, err
	}

	return b, nil
}