Key Storage and Authentication

[kvagajack]

Design document: https://confluence.equibitgroup.com/display/RAD/Keys+Storage+and+Authentication

This epic contains issues to move Portfolio from storing encrypted keys in database, and do not use user/password for authentication, instead use Elliptic Curve signature.

UI:

• Signup with two options:
  • Generate new keys.
  • Accept existing keys (mnemonic, private key, Keystore file).
• Login with EC (Elliptic Curve). Build a new FeathersJS auth strategy.

API:

• Use a public key string as user id.
• Authenticate with EC (Feathers auth plugin).