Is your feature request related to a problem? Please describe.
Need forget password feature for user who already signup, for developmen purposet, use mailtrap.com.

Describe the solution you'd like

Describe alternatives you've considered

Additional context

for email provider, you can use mailchimp or sendgrid.

PR template so that people know what is needed for a PR to be accepted for this repo.

Is your feature request related to a problem? Please describe.

Describe the solution you'd like
A clear and concise description of what you want to happen.
Take too long time for user when forget password

Describe alternatives you've considered
Run send email in background with sidekick or resque

Additional context
Reference:
https://github.com/plataformatec/devise/wiki/How-To:-Send-devise-emails-in-background-(Resque,-Sidekiq-and-Delayed::Job)

Change default design that generate from devise. For css framework you can use bootstrap 4 or bulma.