Account creation with token and AccountCreation false

[ChaosDMG]

The api already work this way. You can sign up if EnableAccountCreation is true or if you have a valid token linked to an organization. Currently the frontend wont submit when you enter with a token if EnableAccountCreation is false.

Here is the relevant api logic:

private async Task<bool> IsAccountCreationEnabledAsync(string? token)
{
    if (_authOptions.EnableAccountCreation)
        return true;`

     if (String.IsNullOrEmpty(token))
        return false;

    var organization = await _organizationRepository.GetByInviteTokenAsync(token);
    return organization is not null;
}

[CLAassistant]

All committers have signed the CLA.

[niemyjski]

Thanks for the PR!!!