.count( [criteria, ] callback )
Purpose
Returns the number of records in your database that meet the given search criteria.
Overview
Parameters
| # | Description | Accepted Data Types | Required ? | 
|---|---|---|---|
| 1 | Find Criteria | {},[{}], string, int | 
No | 
| 2 | Callback | function | 
No | 
Callback Parameters
| # | Description | Possible Data Types | 
|---|---|---|
| 1 | Error | Error | 
| 2 | Number of Records | int | 
Example Usage
User.count({name:'Flynn'}).exec(function countCB(error, found) {
  console.log('There are ' + found + ' users called "Flynn"');
  // There are 1 users called 'Flynn'
  // Don't forget to handle your errors
});
Notes
Any string arguments passed must be the ID of the record.