Create a site similar with Algoritmia - first modules (A03) -- 2

Create a site similar with Algoritmia - first modules [login to view URL] [login to view URL] [login to view URL] Technology Java, JavaScript, Google GWT or similar MySql or PostgreSql databases or similar [login to view URL] Simple steps ahead 1. Register user, login, lost password, logout, deregister get user unique_id and access_key (proposed technologies Google GWT = Java for client and server with MySql or similar database - developer can choose the tools and libraries that he knows better that are good for the whole project) The user can see, after login, a https page where his user_id and access_key (longer than user_id for security) are shown (generated by server at user registration). So he can start calling API at later steps using this 2 info as 3 extra parameters All these should be saved in a database , MySql or similar id, user_id, name, password, email, access_key, active_tokens = 0 2. Buy tokens Once the user is login he can see the number of tokens that he bought (= 0 after successful register and login) Then he can buy new tokens. 1 USD for 10 tokens The module will let him pay using PayPal or Credit Card (Master or Visa or ...) We will need a SSL certificate for that (I will buy and install on production environment) 3. Upload client file to the Server return file_id 4. Upload user parameters, function code and key return task_id 5. More steps to be defined after the previous ones are completed (on a different project and price)