Implement user signup

🚀 Feature Proposal

As a user, I want to have the possibility to sign myself up for a new Akamu App account.

Technical Details

The user is forwarded to the signup process after accepting the privacy policy. The signup process should consist of 3 pages: Username, Password, Email.

The following fields are necessary:

• Valid and available username
• Valid user password
• Valid user email (student/university email)

After a successful signup: an alert is shown to the user which informs him/her that an confirmation/activation email is send to the given email address. He/she has to confirm it first in order to be able to attempt a first login.

After an unsuccessful signup:

Server error code	Action
On 400/500	Inform the user that something went wrong and that the user should try again later.
On 409	Inform the user that either the given username or the given email address are already used and the the user has to try again with other data.