How can I create Breeze Metadata from Sequelize DataTypes using Node.js?

I am using sequelize-auto to generate data types from my database and it works great. The result is something like this:

module.exports = function(sequelize, DataTypes) {
return sequelize.define('ReportTasks', {
    ReportTaskID: {
        type: DataTypes.INTEGER,
        allowNull: false,
        primaryKey: true,
        autoIncrement: true
    },
    BatchID: {
        type: DataTypes.INTEGER,
        allowNull: true,
        references: {
            model: 'ReportBatches',
            key: 'BatchID'
        }
    },
    Name: {
        type: DataTypes.STRING,
        allowNull: true
    },
    Year: {
        type: DataTypes.INTEGER,
        allowNull: true
    },
    Month: {
        type: DataTypes.INTEGER,
        allowNull: true
    },
    CompanyKey: {
        type: DataTypes.INTEGER,
        allowNull: true
    },
    CompanyName: {
        type: DataTypes.STRING,
        allowNull: true
    },
    StartDate: {
        type: DataTypes.DATE,
        allowNull: true
    },
    EndDate: {
        type: DataTypes.DATE,
        allowNull: true
    },
    Status: {
        type: DataTypes.STRING,
        allowNull: true
    }
}, {
    tableName: 'ReportTasks'
});

};

Now I am trying to setup Breeze server and it needs metadata. The examples pull the metadata from a json file, but I want to build the metadata from my models. How can I achieve this?

This is the code from the example (http://breeze.github.io/doc-node-sequelize/introduction.html):

function createSequelizeManager() {
    var metadata = readMetadata();
    var sm = new SequelizeManager(dbConfig, sequelizeOptions);
    sm.importMetadata(metadata);
    return sm;
}

function readMetadata() {
    var filename = "TodoMetadata.json";
    if (!fs.existsSync(filename)) {
        throw new Error("Unable to locate file: " + filename);
    }
    var metadata = fs.readFileSync(filename, 'utf8');
    return JSON.parse(metadata);
}

via Brandon Johnson