I don't think this would be possible, since the password stored in the database would be encrypted by Devise.
In addition you shouldn't want to be e-mailing the user his password in plain-text.
Question
By default devise sends this confirmation email:
Welcome user@email.com!
You can confirm your account email through the link below:
Confirm my account
I'd like it to be:
Welcome user@email.com!
Email: user@email.com
Password: xxxxxxxxx
You can confirm your account email through the link below:
Confirm my account
How can I set this up in app/views/confirmable/mailer/confirmation_instructions.html.erb? and How can I display the password since it has already been encrypted?
Solution
I don't think this would be possible, since the password stored in the database would be encrypted by Devise.
In addition you shouldn't want to be e-mailing the user his password in plain-text.