 first name is required.
                </div>
              </div>
              <div class="col-md-6 mb-3">
                <label for="lastName">Last name</label>
                <input type="text" class="form-control" id="lastName" placeholder="" value="" required>
                <div class="invalid-feedback">
                  Valid last name is required.
                </div>
              </div>
            </div>

            <div class="mb-3">
              <label for="username">Username</label>