Create a Sign Up Page (App Side)

[JCharante]

App:

• Edit Text Field for Username
• Edit Text Field for Password
• Edit Text Field for Email
• Button for Registering
• Add a route for the signup in Constants.java that is server_address + "/signUp"
• Make the username & password stick to utf-8 legal characters
• When clicking the button, wait for a response from the server. Either success, missing, or invalid. Move onto the Login Activity if it's a success, if it returns invalid then that means that the username & password did not stick to utf-8 and if it's missing it means one of the fields is missing.