nextcloud/core/lostpassword/templates/lostpassword.php

<?php
//load the file we need
OCP\Util::addStyle('lostpassword', 'lostpassword'); ?>
<form action="<?php print_unescaped($_['link']) ?>" method="post">
	<fieldset>
		<div class="update"><?php p($l->t('You will receive a link to reset your password via Email.')); ?></div>
		<p>
			<input type="text" name="user" id="user" placeholder="<?php p($l->t( 'Username' )); ?>" value="" autocomplete="off" required autofocus />
			<label for="user" class="infield"><?php p($l->t( 'Username' )); ?></label>
			<img class="svg" src="<?php print_unescaped(image_path('', 'actions/user.svg')); ?>" alt=""/>
			<?php if ($_['isEncrypted']): ?>
				<br />
				<p class="warning"><?php p($l->t("Your files are encrypted. If you haven't enabled the recovery key, there will be no way to get your data back after your password is reset. If you are not sure what to do, please contact your administrator before you continue. Do you really want to continue?")); ?><br />
				<input type="checkbox" name="continue" value="Yes" />
				<?php p($l->t('Yes, I really want to reset my password now')); ?></p>
			<?php endif; ?>
		</p>
		<input type="submit" id="submit" value="<?php p($l->t('Reset')); ?>" />
	</fieldset>
</form>