Prisma in module worker

`Invalid
  value ${JSON.stringify(e)} for datasource "${r}" provided to PrismaClient constructor.

export default {
    async fetch(
        request: Request,
        env: Env,
        ctx: ExecutionContext
    ): Promise<Response> {
        console.log(env.DATABASE_URL)
        const prisma = new PrismaClient({
            datasources: {
                db: {
                    url: env.DATABASE_URL,
                }
            }
        });
        const users = await prisma.user.findMany();
        return new Response("Hello World!");
    },
};