Fluxy errors

Stores.js

var loginStore = Store({
  
  init(dispatcher){
    var self = this;
    
    dispatcher.register(function(action, payload){
      if( action === 'LOGIN')
        self.login()
    })
  },
  
  login(){
    api.login()
      .catch(function(err){
        this.state.error = err
      })
      .finally(function(){
        this.emitChange()
      })
  }
})

var alerts = Store({
  init(dispatcher){
    var self = this;
    dispatcher.register(function(action, payload){
      if( action === 'LOGIN')
        this.login()
    })
  },
  
  login(){
    this.waitFor('loginStore')
    
    if (loginStore.state.error) {
      this.state.authError = loginStore.state.error
      this.emitChange()
    }
  }
})