Считайте конфигурацию глобально в Vue js, например Mixins

export default {
  name: 'RootComponent',
  provide () {
    let provider = {}
    Object.defineProperty(provider, 'appSettings', {
      iteratable: true,
      get: () => this.appSettings
    })
    return provider
  },
  data () {
    return {
      appSettings: {}
    }
  },
  mounted () {
    this.yourApiCall().then((result) => {
      this.$set(this.$data, 'appSettings', result)
    })
  }
}

export default {
  name: 'SubComponent',
  inject: ['appSettings'],
  mounted () {
    console.info(this.appSettings)
  }
}