How to Register App Users With the User Registration API

package samples.mbaas.com.cookbook;
import android.app.ProgressDialog;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.backendless.Backendless;
import com.backendless.BackendlessUser;
import com.backendless.async.callback.AsyncCallback;
import com.backendless.exceptions.BackendlessFault;
public class MainActivity extends AppCompatActivity {
    private static String APPID = "YOUR-APP-ID";
    private static String APIKEY = "YOUR-ANDROID-API-KEY";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Backendless.initApp(this, APPID, APIKEY );
        BackendlessUser user = new BackendlessUser();
        user.setEmail( "green.goblin@backendless.com" );
        user.setPassword( "sp1dey" );
        user.setProperty( "name", "Green Goblin" );
        user.setProperty( "phoneNumber", "212-555-1212" );
        final ProgressBar progressBar = findViewById(R.id.progressbar);
        progressBar.setVisibility(View.VISIBLE);
        Backendless.UserService.register(user, new AsyncCallback<BackendlessUser>() {
            @Override
            public void handleResponse(BackendlessUser response) {
                progressBar.setVisibility(View.INVISIBLE);
                Toast.makeText(getContext(), "User has been registered", Toast.LENGTH_LONG).show();
            }
            @Override
            public void handleFault(BackendlessFault fault) {
                progressBar.setVisibility(View.INVISIBLE);
                Toast.makeText(getContext(), fault.getMessage(), Toast.LENGTH_LONG).show();
            }
        });
    }
    public Context getContext() {
        return this;
    }
}

val user = BackendlessUser()
user.email = "green.goblin@backendless.com"
user.password = "sp1dey"
user.setProperty("name", "Green Goblin")
user.setProperty("phoneNumber", "212-555-1212")

Backendless.UserService.register(user, object : AsyncCallback<BackendlessUser> {
   override fun handleResponse(registeredUser: BackendlessUser?) {
       Log.i(TAG, "User has been registered")
   }

   override fun handleFault(fault: BackendlessFault?) {
       Log.e(TAG, fault?.message)
   }
})

BackendlessUser *user = [BackendlessUser new];
user.email = @"green.goblin@backendless.com";
user.password = @"sp1dey";
[user addPropertyWithPropertyName:@"phoneNumber" propertyValue:@"214-555-1212"];
    
[Backendless.shared.userService registerUserWithUser:user responseHandler:^(BackendlessUser *registeredUser) {
    NSLog(@"User has been registered: %@", registeredUser);
} errorHandler:^(Fault *fault) {
    NSLog(@"Error: %@", fault.message);
}];

let user = BackendlessUser()
user.email = "green.goblin@backendless.com"
user.password = "sp1dey"
user.addProperty(propertyName: "phoneNumber", propertyValue: "214-555-1212")
        
Backendless.shared.userService.registerUser(user: user, responseHandler: { registeredUser in
    print("User has been registered: \(registeredUser)")
}, errorHandler: { fault in
    print("Error: \(fault.message ?? "")")
})

const Backendless = require('backendless')
/*
 Or use `import Backendless from 'backendless'` for client side.
 If you don't use npm or yarn to install modules, you can add the following line
 <script src="//api.backendless.com/sdk/js/latest/backendless.min.js"></script>
 to your index.html file and use the global Backendless variable.
*/

Backendless.initApp('YOUR_APP_ID', 'YOUR_JS_API_KEY')

const onSuccess = user => {
  console.log('User has been registered:\n', user)
}

const onError = error => {
  console.error('Server reported an error: ', error.message)
  console.error('error code: ', error.code)
  console.error('http status: ', error.status)
}

const user = new Backendless.User()

user.email = 'green.goblin@backendless.com'
user.password = 'sp1dey'
user.name = 'Green Goblin'
user.phoneNumber = '212-555-1212'

Backendless.UserService.register(user)
  .then(onSuccess)
  .catch(onError)

BackendlessUser user = BackendlessUser();
user.email = "green.goblin@backendless.com";
user.password = "sp1dey";
user.setProperty("name", "Green Goblin");
user.setProperty("phoneNumber", "212-555-1212");
Backendless.UserService.register(user).then((registeredUser) => print("User has been registered"));