Unset the password fields errors from MemberPress and auto-generate the user pass instead

memberpress-hide-password-fields.php

<?php
//This file only unsets the errors
//You'll still need to override the app/views/checkout/form.php file to remove the password fields HTML
//You can find instructions on overriding template files here: https://www.memberpress.com/1.1.7
function unset_password_validation_errors($errors) {
  if(empty($errors)) { return $errors; } //Should never happen if the password fields are hidden

  //Unset the password field errors
  // IF YOU'VE TRANSLATED THE PLUGIN - YOU MAY NEED TO CHANGE THESE ENGLISH TEXTS TO YOUR LANGUAGE
  foreach($errors as $i => $v) {
    if($v == 'You must enter a Password.') {
      unset($errors[$i]);
    }

    if($v == 'You must enter a Password Confirmation.') {
      unset($errors[$i]);
    }

    if(stripslashes($v) == "Your Password and Password Confirmation don't match.") {
      unset($errors[$i]);
    }
  }

  //Artificially set a password here
  $_POST['mepr_user_password'] = uniqid(); //Deprecated?
  $_REQUEST['mepr_user_password'] = uniqid();

  return $errors;
}
add_filter('mepr-validate-signup', 'unset_password_validation_errors');

UPDATE: MP Has since created a setting to "Hide password fields" so this code is really no longer necessary.