{
  routes: {
    'POST /user/login': async function (req, res) {
      const { login, password } = req.body
      const responseBody = await this.controllers.userLogin(login, password)
      return res(responseBody {
        type: 'application/json',
        headers: [
          'Api-Version': '1.0.1',
        ]
      })
    }
  },

  controllers: {
    userLogin: async function (login, password) {
      const userLoginDto = new UserLoginDto(login, password)
      const requestBody = await this.services.useLoginService(userLoginDto)
      return requestBody
    }
  }

  services: {
    userLoginService: async function (userLoginDto) {
      const sessionToken = await this.repositories.user.validateCredentials(userLoginDto)
      return sessionToken
    }
  }

  repositories: {
    user: {
      validateCredentials: async function (login, password) {
        const { login, password } = userLoginDto
        const user = await this.entities.userEntity.findOne({ username: login })
        if (user && user.methods.validatePassword(password)) {
          return {
            token: user.getSessionToken(login, password)
          }
        } else {
          return null
        }
      }
    }
  }

  entities: {
    userEntity: {
      schema: {
        id: {
          type: number,
          relation: 'Column'
        },
        likes: {
          type: array,
          relation: 'OneToMany'
          relations: ...
        },
        password...
        salt...
      },
      methods: {
        validatePassword: async function (password) {
          const hash = await bcrypt.hash(password, this....schema.salt)
        }
        return hash === this.[Symbol].schema.password
      }
    }
  }
}

// dariuszsikorski.pl