Required

* mac 10.15 .0 or above
* os13 or above 
* enables `Sign in with Apple` features on Apple developer website
* Signing & Capabilities in Xcode enables `Sign in with Apple` 

Installation

npm i capacitor-plugin-sign-in-with-apple

Usage

import {
    Plugins,
    Capacitor
} from '@capacitor/core';
const {
    SignInWithApple
} = Plugins;

get isiOS(): boolean {
    return Capacitor.getPlatform() === 'ios';
}

/* then:
 success: {"state" : 1, info: {state:xx,userIdentifier:xx,familyName:xx,givenName:xnickname:xxmiddleName:xx,namePrefix:xx,email:xx,identityToken:xx,authCode:xx....}} 
 
 error: {"state" : -1
 "errCode" : errCode,
 "errDesc" : errDesc
 }
 errCode = 0 ,  errDesc: other
 errCode = -1 ,  errDesc: User cancelled authorization request
 errCode = -2 ,  errDesc: Authorization request failed
 errCode = -3 ,  errDesc: Authorization request is not responding
 errCode = -4 ,  errDesc: Failed to process authorization request
 errCode = -5 ,  errDesc: Authorization request failed : unknown reason
 */
login(): Promise <any> | null {
    if (!this.isiOS) return null;
    if (!SignInWithApple) return null;
    return SignInWithApple.login()

}

/**
 * then: {canShowButton: true/false}
 */
getCanShowButton(): Promise <any> | null {
    if (!this.isiOS) return null;
    if (!SignInWithApple) return null;
    return SignInWithApple.getCanShowButton()
}

/**
 * 
 * @param userId string
 * then: 
 * {"state":1,"errDesc": "Apple ID Credential is valid"}
   {"state":-1, "errDesc": "Apple ID Credential revoked, handle unlink"}
   {"state":-2, "errDesc": "Credential not found, show login UI"}
   {"state":-3, "errDesc": "Other"}
 */
public checkState(userId: string): Promise <any> | null {
    if (!this.isiOS) return null;
    if (!SignInWithApple) return null;

    let message = {
        userId
    }

    return SignInWithApple.checkStateWithUserID(message)
}