Mail providers configuration bugfix

After changing email service provider with Generator I got the following error:

    Error: Authentication required, invalid details provided
    at SMTPTransport.sendMail (/home/raido/hackathon-starter/node_modules/nodemailer/lib/engines/smtp.js:124:22)
    at Transport.sendMailWithTransport (/home/raido/hackathon-starter/node_modules/nodemailer/lib/transport.js:80:20)
    at Nodemailer.sendMail (/home/raido/hackathon-starter/node_modules/nodemailer/lib/nodemailer.js:206:20)
    at /home/raido/hackathon-starter/node_modules/nodemailer/lib/nodemailer.js:68:20
    at Nodemailer.validateSettings (/home/raido/hackathon-starter/node_modules/nodemailer/lib/nodemailer.js:193:5)
    at sendMail (/home/raido/hackathon-starter/node_modules/nodemailer/lib/nodemailer.js:62:12)
    at Transport.transport.sendMail (/home/raido/hackathon-    starter/node_modules/nodemailer/lib/nodemailer.js:30:9)
    at /home/raido/hackathon-starter/controllers/user.js:372:21
    at fn (/home/raido/hackathon-starter/node_modules/async/lib/async.js:641:34)
    at Object._onImmediate (/home/raido/hackathon-starter/node_modules/async/lib/async.js:557:34)


Generator changes `contact.js` and `users.js` and expects the key `user` for all mail service providers configuration.

Did the easy fix and edited `secrets.js`.


Raido