How to store firebase user email and password in Ionic Storage

Question

I'm new to ionic 3 and firebase. I have built an application that uses email and password to authenticate users. Right now whenever you quit the app, It logs the user out and they have to re-login which can be a hassle. I have seen hints of some users saving the user credentials (email and password) in Storage (@ionic/storage) so the next time they use the app it will automatically sign them in. Is this the correct way to go about this? And if so, could I please see and example? Any help would be great.

Answer 1

Yes, of course, but it better store with checked checkbox 'Remember me', that allows user to make choise use it or not.

And i prefer use NativeStorage

import { NativeStorage } from '@ionic-native/native-storage';

let login: string;

constructor(private nativeStorage: NativeStorage, ...) {
    this.login = '';
}

Store example:

this.nativeStorage.setItem('LOGIN', 'Your Value').then(
    () => {
        // Do something, optional
    },
    error => {

    }
);

Getting example:

this.nativeStorage.getItem('LOGIN').then(
    (data) => {
        // Get value and put it into our variable
        this.login = data;
    },
    error => {

    }
);

And use it in your view:

<ion-input [(ngModel)]="login" type="text"></ion-input>

More info about NativeStorage:

https://ionicframework.com/docs/native/native-storage/