api.js

/**
 *
 * params will contain the attributes to send (as an object)
 *   -> will be defined later
 *
 * callback is called, once the request was sent to the server.
 * It'll transmit an object containing the
 *    -> state (0 = successful, 1 = error, 2 = ?)
 *    -> main message (string)
 *    -> errors (null, if non; array of strings with messages else)
 *
 * @param params
 * @param callback
 */
function api_send_signup(params, callback) {

    // TODO evaluate params and send them

    callback({
        state: 0,
        messages: 'Successful signup',
        errors: null
    })
}