How to use the react-native-mixpanel.sharedInstanceWithToken function in react-native-mixpanel

function initMixpanel() {
  if (!trackingEnabled) {
    return;
  }
  let mixpanelApiKey = null;
  if (__DEV__) {
    mixpanelApiKey = '668941ad91e251d2ae9408b1ea80f67b';
  } else {
    mixpanelApiKey = 'f5d9d18ed1bbe3b190f9c7c7388df243';
  }

  const mixpanel = Mixpanel.sharedInstanceWithToken(mixpanelApiKey);
  // Don't use global track(), since this is a Mixpanel-only event:
  Mixpanel.track('$app_open');
  return mixpanel;
}

function initMixpanel() {
  if (!trackingEnabled) {
    return;
  }
  let mixpanelApiKey = null;
  if (__DEV__) {
    mixpanelApiKey = '668941ad91e251d2ae9408b1ea80f67b';
  } else {
    mixpanelApiKey = 'f5d9d18ed1bbe3b190f9c7c7388df243';
  }

  Mixpanel.sharedInstanceWithToken(mixpanelApiKey);
  if (DeviceInfo.getModel() === 'Calypso AppCrawler') {
    Mixpanel.registerSuperProperties({ $ignore: true });
  }
  // Don't use global track(), since this is a Mixpanel-only event:
  Mixpanel.track('$app_open');
}

import * as Mixpanel from 'react-native-mixpanel';

Mixpanel.sharedInstanceWithToken('1234567890');
Mixpanel.track('Event name');
Mixpanel.trackWithProperties('Click Button', { button_type: 'yellow button', button_text: 'magic button' });
Mixpanel.createAlias('123456');
Mixpanel.identify('123456');
Mixpanel.set({ $email: 'elvis@email.com' });
Mixpanel.setOnce({ $email: 'elvis@email.com', Created: new Date().toISOString() });
Mixpanel.timeEvent('Image Upload');
Mixpanel.track('Image Upload');
Mixpanel.registerSuperProperties({ 'Account type': 'Free', 'User Type': 'Vendor' });
Mixpanel.registerSuperPropertiesOnce({ Gender: 'Female' });
Mixpanel.trackCharge(399);
Mixpanel.trackChargeWithProperties(399, { product: 'ACME Wearable tech' });
Mixpanel.increment("Login Count", 1);
Mixpanel.setPushRegistrationId('1234567890abc');
Mixpanel.initPushHandling('123456666');
Mixpanel.clearPushRegistrationId();

export default function setup(): Class {
  console.disableYellowBox = true;

  if (__DEV__) {
    Mixpanel.sharedInstanceWithToken('668941ad91e251d2ae9408b1ea80f67b');
  } else {
    Mixpanel.sharedInstanceWithToken('f5d9d18ed1bbe3b190f9c7c7388df243');
  }

  class Root extends React.Component {
    state: {
      isLoading: boolean,
      store: any,
    };

    constructor() {
      super();
      this.state = {
        isLoading: true,
        store: configureStore(() => this.setState({isLoading: false})),
      };
    }

export default function setup(): Class {
  console.disableYellowBox = true;

  if (__DEV__) {
    Mixpanel.sharedInstanceWithToken('668941ad91e251d2ae9408b1ea80f67b');
  } else {
    Mixpanel.sharedInstanceWithToken('f5d9d18ed1bbe3b190f9c7c7388df243');
  }

  class Root extends React.Component {
    state: {
      isLoading: boolean,
      store: any,
    };

    constructor() {
      super();
      this.state = {
        isLoading: true,
        store: configureStore(() => this.setState({isLoading: false})),
      };

constructor() {
    if (!__DEV__) {
      Mixpanel.sharedInstanceWithToken(TOKEN_API)
    }
  }