User should get a magic link on signup instead of recovery

[sirpy]

Instead of sending the recovery seed phrase We send a link with the user's gundb username+password ie dapp.gooddollar.org?magiclink=username+pass encoded

username and password already generated from a seed phrase in this par of code: https://github.com/GoodDollar/GoodDAPP/blob/ed432880af9b3918acc7d8475025a23005f44a51/src/lib/gundb/UserStorageClass.js#L327-L328

Flow

• DAPP saves seedphrase in user profile encrypted ( you should save this field as private and gundb encrypts it automatically )
• DAPP sends to server username+password to gundb
• Server sends magiclink email to user
• DAPP can parse magiclinks, login to gundb, read seedphrase and set it (similar to recovery) Check recovery https://github.com/GoodDollar/GoodDAPP/blob/master/src/components/signin/Mnemonics.js
• DAPP menu send recovery seed phrase works as usual (ie sends seed phrase to email)

Definition of Done

• [x] A user gets an email with Magic link instead of Recovery email
• [x] magiclink=username+pass encoded
• [x] DAPP saves encrypted seedphrase in user profile in gundb
• [x] A user can click on the link and logged in successfully ( show user's dashboard after login, we'll check if it takes long, than add some kind of progress bar )
• [x] A user is able to back up a wallet from menu as usual ( resend back up email with the seedphrase works )

[sirpy]

@AnastasiiaOdnoshevna this can only be tested on goodqa env since emails are not sent on gooddev

[sirpy]

@AnastasiiaOdnoshevna this should be testable no goodqa now, though we still didnt modify the email template

[qatests1001]

Checked on https://goodqa.netlify.com/ There is a bug https://www.screencast.com/t/6cM0Ne3y6

[sirpy]

@qatests1001 you are trying to use with an invalid w3 token.