in web/js/faker.js [1714:1732]
self.userName = function (firstName, lastName) {
var result;
firstName = firstName || faker.name.firstName();
lastName = lastName || faker.name.lastName();
switch (faker.random.number(2)) {
case 0:
result = firstName + faker.random.number(99);
break;
case 1:
result = firstName + faker.random.arrayElement([".", "_"]) + lastName;
break;
case 2:
result = firstName + faker.random.arrayElement([".", "_"]) + lastName + faker.random.number(99);
break;
}
result = result.toString().replace(/'/g, "");
result = result.replace(/ /g, "");
return result;
};