Promise each iteration error in nodejs - node.js

Question

I'm trying to adopt bluebird Promise for my existing project which uses sails.js, here's the snippet:
var isUserTeamCaptain = function(userId, teamId) {
return new Promise(function(resolve, reject) {
Team.findOne({id: teamId}).then(function(team) {
if (team) {
if (userId != team.captain) {
reject(sails.__('you are not captain, thus cannot edit team info'));
} else {
resolve(team);
}
} else {
reject(sails.__('team not found'));
}
}).catch(function(err) {
reject(err);
});
});
};
isUserTeamCaptain('5604145aa8944407362d6abf', '560496d157f6995702b3f931').then(
function resolve(team) {
console.log('passed');
return Promise.resolve(User.find());
},
function reject(err) {
console.log('failed');
console.log('the error: ' + err);
throw new Error(err);
}
).each(function(user) {
console.log(user.username);
}).then(function() {
console.log('we are done with each iteration')
}).catch(function(err) {
console.log(err.message);
})
It works great, each username can be printed in console, so can 'we are done with each iteration', also in the order I expected.
BUT, if I put the isUserTeamCaptain in another js file, say 'TeamService.js', export and inject TeamService here and then refactor the above snippet of code like so:
TeamService.isUserTeamCaptain('5604145aa8944407362d6abf', '560496d157f6995702b3f931').then(
function resolve(team) {
console.log('passed');
return Promise.resolve(User.find());
},
function reject(err) {
console.log('failed');
console.log('the error: ' + err);
throw new Error(err);
}
).each(function(user) {
console.log(user.username);
}).then(function() {
console.log('we are done with each iteration')
}).catch(function(err) {
console.log(err.message);
})
It complains about
.each(function(user) { ...
being an UNDEFINED FUNCTION. Did I miss anything here?
UPDATE: this is the TeamService.js:
// TeamService.js - in api/services
var TeamService = module.exports = {
/**
* Promise version of isUserCaptainOfTeam
*/
isUserTeamCaptain: function(userId, teamId) {
return new Promise(function(resolve, reject) {
Team.findOne({id: teamId}).then(function(team) {
if (team) {
if (userId != team.captain) {
reject(sails.__('you are not captain, thus cannot edit team info'));
} else {
resolve(team);
}
} else {
reject(sails.__('team not found'));
}
}).catch(function(err) {
reject(err);
});
});
}
};
UPDATE: kinda found out where my problem was, I missed
var Promise = require('bluebird');
in TeamService.js...