discourse/app/assets/javascripts/admin/addon/components/site-settings/string.hbs

{{#if this.setting.textarea}}
  <Textarea @value={{this.value}} class="input-setting-textarea" />
{{else if this.isSecret}}
  <Input
    @type="password"
    @value={{this.value}}
    class="input-setting-string"
    autocomplete="new-password"
  />
{{else}}
  <TextField @value={{this.value}} @classNames="input-setting-string" />
{{/if}}

<SettingValidationMessage @message={{this.validationMessage}} />
<SiteSettings::Description @description={{this.setting.description}} />