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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | 1x 3x 1x 2x 1x 1x 1x | /* */ "use strict"; /* In real life, validateUser could check a database, look into an Active Directory, call another service, etc. -- but for this demo, let's keep it quite simple and only accept a single hardcoded user. */ const validateUser = ( userName , password , callback ) => { if (!userName || !password) { callback("Missing user/password", null); } else if (userName === "fkereki" && password === "modernjsbook") { callback(null, "fkereki"); // OK, send userName back } else { callback("Not valid user", null); } }; module.exports = validateUser; |