add user account deletion (right to be forgotten)

app/templates/users/settings.html

@@ -43,5 +43,8 @@
     <input type="password" id="new_password2" name="new_password2" pattern="(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[\W_])(?!.*\s).{10,}" title="10+ chars with: 1 uppercase, 1 lowercase, 1 number, 1 special char, and no spaces" required autocomplete="new-password"><br>
     <input class="warn" type="submit" value="Change password">
   </form>
+  <div>
+    <a class="linkbutton critical" href="{{ url_for('users.delete_page', username=active_user.username) }}">Delete account</a>
+  </div>
 </div>
 {% endblock %}