从 mysql 迁移后，postgres 数据库无法正常工作

I change MySQL databese into postgreSQL in sequelize. But After migration I have issue with upper and lowercase first letter in Table or Model... Before my MySQL version was working properly but after migration I got error message: 500 SequelizeDatabaseError: relation "Users" does not exist

我的用户模型:

module.exports = function(sequelize, Sequelize) {
  var User = sequelize.define("User", {
    // profile
    userlevel: Sequelize.STRING,
    restaurant: Sequelize.STRING,
    access: Sequelize.STRING,
    optionsid: Sequelize.STRING,
    email: Sequelize.STRING,
    name: Sequelize.STRING,
    gender: Sequelize.STRING,
    location: Sequelize.STRING,
    website: Sequelize.STRING,
    picture: Sequelize.STRING,
    // Oauth
    password: {
      type: Sequelize.STRING,
      set: function(v) {
        var salt = bcrypt.genSaltSync(5);
        var password = bcrypt.hashSync(v, salt);
        return this.setDataValue('password', password);
      }
    },
    .....

迁移文件:

"use strict";
module.exports = {
  up: function(migration, DataTypes, done) {
    migration.createTable("users", {
      id: {
        allowNull: false,
        autoIncrement: true,
        primaryKey: true,
        type: DataTypes.INTEGER
      },
      userlevel: {
        type: DataTypes.STRING,
        defaultValue: '5'
      },
      restaurant: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      access: {
        type: DataTypes.STRING,
        defaultValue: '1'
      },
      optionsid: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      email: {
        type: DataTypes.STRING,
        allowNull: false
      },
      name: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      gender: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      location: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      website: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      picture: {
        type: DataTypes.STRING,
        defaultValue: ''
      },
      password: {
        type: DataTypes.STRING
      },
      facebook: {
        type: DataTypes.STRING
      },
      twitter: {
        type: DataTypes.STRING
      },
      google: {
        type: DataTypes.STRING
      },
      tokens: {
        type: DataTypes.STRING
      },
      resetPasswordToken: {
        type: DataTypes.STRING
      },
      resetPasswordExpires: {
        type: DataTypes.DATE
      },
      createdAt: {
        allowNull: false,
        type: DataTypes.DATE
      },
      updatedAt: {
        allowNull: false,
        type: DataTypes.DATE
      }
    }).done(done);
  },
  down: function(migration, DataTypes, done) {
    migration.dropTable("users").done(done);
  }
};

如果我将 postgreSQL 中表的第一个字母更改为大写，一切正常...