Learning object composition in javascript

Question

I am still trying to get in my head the object fundamentals in javascript which seems to be quite different than classical paradigm. I have written a toy example to fetch weather data, the code is below:

import axios from 'axios'

const weatherService = {
  fetch: async endpoint => await axios.get(endpoint)
}

const weatherApi = {
  currentWeather: async city => {
    try {
      const { data: { data } } = await this.service.fetch(this.config.endpoints.curr)
      return this.handleCurrentData(data)
    } catch(e) {
      this.handleError(e)
    }
  },
  hourlyForecast: async city => {
    try {
      const { data: { data } } = await this.service.fetch(this.config.endpoints.hour)
      return this.handleHourlyData(data)
    } catch(e) {
      this.handleError(e)
    }
  }
};

const defaultConfig = {
  key: process.env.API_KEY,
  endpoints: {
    curr: `/current/geosearch?key=${this.key}`,
    hour: `/forecast/3hourly/geosearch?key=${this.key}`
  }
};

const api = (api, config, service) => {
  return {
    Object.create(weatherApi),
    Object.create(service),
    Object.create(config),
    ...obj
  }
};

// dependency injection for testing
module.exports = (obj, config=defaultConfig, service=weatherService) => {
  return api(obj, config, service)
};


// Usage
const weatherAPI = require('api')({
  handleCurrentData: (data) => console.log(data),
  handleHourlyData: (data) => console.log(data)
});

weatherAPI.currentWeather('London');
weatherAPI.hourlyWeather('London');

I would like to know if I am going in the correct direction? If not what are improvement in thinking process as well as in code needed?

PS: I know I could have written the above api easily by exporting functions but this is an attempt to learn object composition.