title: Android Allow some users to download my app free from PlayStore
body: <p>I have a paid app in PlayStore. I want to let some users download my app for free. There is no in-app purchase feature in my app. One thing that I can do that by emailing them the apk file and then they download on their phones but it involves some risk of misuse. So my question is is there option available in PlayStore which can let me do this?
  OK, in APK section of the Google Play Console, I saw two options i.e Beta Testing and Alpha Testing. I decided to upload a beta apk and then allow a Google group to become tester and download my app. When the user goes to the link provided by the Beta Testing, it asks user to configure my Google Wallet account. Is it necessary to have a payment account configured to be able to test beta app?</p>