As a user I want to sign up so that I can sign in
- User needs provide username, email and password to create an account
- New account is inactive and can't be signed in
- Confirmation link is send on provided email
- Confirmation link is valid for 24h and account is automatically purged if link is outdated
- After clicking on confirmation link account is activated and user can sign in
- User need to provide username/email and password to sign in
- Only user that is not signed in can sign up
- Signed in user is redirected to home