Sails Create multiple instance of a module in Sails - sails.js

Question

I'm trying to create 2 user in parallel and wait for it to be created after do something else. I was trying to use:
Promise.all([User.create(usr1), User.create(usr2), User.create(usr3)]).then(function(){
console.log("\o/");
}
without luck, because User.create() do not return a Promise.
I also tried:
User.create([usr1, usr2]).then(function(){
console.log('x')
})
Error that I get:
[Error (E_VALIDATION) 1 attribute is invalid] Invalid attributes sent to undefined:
• user
• A record with that user already exists (null).
Ugly code that is working:
User.create([usr1]).then(function(){
User.create[usr2].then(function(){ console.log('x') });
});
Also work with .exec()
User.create([usr1, usr2]).exec(function(){
console.log('x')
})
How can I use Promise or just waterline to create two user?
EDIT:
1) Calling it in mocha test
Code here
attributes: {
name: {
type: 'string',
required: true
},
email: {
type: 'email',
required: true,
unique: true
},
password: {
type: 'string',
minLength: 6,
},
//Association One-to-One, but using 'collection' to mantain sync updating
employer: {
collection: 'employer',
via: 'user'
},
employee: {
collection: 'employee',
via: 'user'
},
//Google Signin ID
googleId: 'string',
//Access token from the Google Authorization Server
googleAccessToken: 'string',
resetPasswordToken: String,
resetPasswordExpires: Date,
toJSON: function() {
var obj = this.toObject();
delete obj.password;
delete obj.resetPasswordToken;
delete obj.resetPasswordExpires;
return obj;
}
},
EDIT2:
This error only happens when I use sails-disk, in sails-mongo work