let f ?nick ?password request =

%   begin match nick, password with
%   | Some nick, Some password ->
%     begin match User.login ~nick ~password with
%     | Error e ->
Error: <%s e %>
%     | Ok () ->
Logged in ! Happy planting XD
%     end;
%   | _ ->
    <%s! Dream.form_tag ~action:"/login" request %>
      <div class="mb-3">
        <label for="nick" class="form-label">Nick</label>
        <input name="nick" type="text" class="form-control" id="nick" aria-describedby="nickHelp">
        <div id="nickHelp" class="form-text">Who are u ?</div>
      </div>
      <div class="mb-3">
        <label for="password" class="form-label">Password</label>
        <input name="password" type="password" class="form-control" id="password">
      </div>
      <button type="submit" class="btn btn-primary">Submit</button>
    </form>
%   end;