bp_signup_check_email_username()

function bp_signup_check_email_username() {

	$signup_username = '';
	$signup_email    = '';
	$account_details = bp_core_validate_user_signup( bp_get_signup_username_value(), bp_get_signup_email_value() );
	$email_opt       = function_exists( 'bp_register_confirm_email' ) && true === bp_register_confirm_email() ? true : false;
	$password_opt    = function_exists( 'bp_register_confirm_password' ) && true === bp_register_confirm_password() ? true : false;
	// If there are errors with account details, set them for display.
	if ( ! empty( $account_details['errors']->errors['user_name'] ) ) {
		$signup_username = $account_details['errors']->errors['user_name'][0];
	}

	if ( ! empty( $account_details['errors']->errors['user_email'] ) ) {
		$signup_email = $account_details['errors']->errors['user_email'][0];
	}
	// if email opt enabled.
	if ( true === $email_opt ) {

		// Check that both password fields are filled in.
		if ( empty( $_POST['signup_email'] ) || empty( $_POST['signup_email_confirm'] ) ) {
			$signup_email = __( 'Please make sure to enter your email twice.', 'buddyboss' );
		}

		// Check that the passwords match.
		if ( ( ! empty( $_POST['signup_email'] ) && ! empty( $_POST['signup_email_confirm'] ) ) && $_POST['signup_email'] != $_POST['signup_email_confirm'] ) {
			$signup_email = __( 'The emails entered do not match.', 'buddyboss' );
		}
	}
	$nickname_field = 'field_' . bp_xprofile_nickname_field_id();
	$return         = array(
		'field_id'        => bp_xprofile_nickname_field_id(),
		'signup_email'    => $signup_email,
		'signup_username' => $signup_username,

	);

	wp_send_json( $return, true );
}