block8.js

const Joi = require('joi');

const schema = Joi.object()
	.keys({
		username: Joi.string()
			.alphanum()
			.min(3)
			.max(30)
			.required(),
		password: Joi.string().regex(/^[a-zA-Z0-9]{3,30}$/),
		access_token: [Joi.string(), Joi.number()],
		birthyear: Joi.number()
			.integer()
			.min(1900)
			.max(2013),
		email: Joi.string().email({ minDomainAtoms: 2 })
	})
	.with('username', 'birthyear')
	.without('password', 'access_token');