Takeover of an account via reset password options after removing the account

Hi, The Reset password mechanism can't validate or authenticate an user properly. After removing a user account it's possible to takeover the user account by using reset password option. which is turn into takeover an account. ##Step to Reproduce: 1. Go to [weblate](https://demo.weblate.org) 2. Remove your account from [weblate](https://demo.weblate.org) 3. Now go to for [login](https://demo.weblate.org/accounts/login/) 4. Enter username or email and password, try to login. you are failed to login because email and password is removed 5. Now click on [reset it](https://demo.weblate.org/accounts/reset/) 6. Enter email and captcha and hit `Reset my password` {F186309} 7. Open mail and click on reset password link {F186311} 8. Now enter Password twice and login to the account After doing all the steps you are successfully able to change the password. {F186313} Thanks