service.js

module.exports = {
  async signup(name, email, password) {
    const exists = await models.user.findOne({ where: { email } })

    if (exists) {
      throw new Error({ error: 'E-mail já existe. Tente se registrar com outro.' })
    }

    const passwordEncrypted = await hashing(password)

    const user = await models.user.build({ name, email, password: passwordEncrypted })
    await user.save()

    return { user }
  },
  
  
  ...