Updated readme for new functionality

README.md

@@ -1,52 +1,75 @@
 # Socket Programming
+
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 [![codecov](https://codecov.io/gh/hazzery/socket-programming/graph/badge.svg?token=6GQA3I43XT)](https://codecov.io/gh/hazzery/socket-programming)
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-# Usage Instructions
+## Usage Instructions
 
 To start the server program, execute the following command in the project directory.
+
 ```bash
 python3 -m server <port_number>
 ```
+
 This starts up a welcoming socket, which listens for client connections
 on the specified `port_number` for incoming connections.
 
+To send and read messages, you must execute the client program using the
+following command.
 
-To send and read messages, you must execute the client program using the following command.
 ```bash
-python3 -m client <server_address> <port_number> <username> <message_type>
+python3 -m client <server_address> <port_number> <username>
 ```
-Here, `server_address` is the IP address of the computer in which the server program is running on,
-`port_number` is the port number on which the server program is listening for incoming connections,
-`username` is the name of the client connecting to the server, and `message_type` is the type of
-request to send to the server. This can be either `create` to send somebody a message,
-or `read` to receive messages that have been sent to you.
 
-Upon making a Create request, you will be prompted to enter the name of the
-recipient of your message, and the message you would like to send them.
+Here, `server_address` is the IP address of the computer in which the server
+program is running on, `port_number` is the port number on which the server
+program is listening for incoming connections, `username` is the name of the
+client connecting to the server.
+
+Running the client will prompt you to input the name of the request you wish to
+perform.
+
+- `register` sends your name and randomly generated RSA public key to the server
+- `login` has the server generate you a session token used to validate requests
+- `key` requests another user's public key so you can send them messages
+- `create` to send somebody a message
+- `read` to receive messages that have been sent to you.
+
+Note: All request names are case-insensitive, so can be capitalised if you like
+
+Upon making a create, you will be prompted to enter the name of the recipient
+of your message, and the message you would like to send them. Making a key
+request will prompt you to enter the name of the user whose key you want.
 
 ## Example Usage
+
 ### Server
+
 ```bash
 python3 -m server 12000
 ```
 
 ### Client 1
+
 ```bash
-python3 -m client localhost 12000 Alice create
+python3 -m client localhost 12000 Alice
+create
 John
 Hello John! How are you?
 ```
 
 ### Client 2
+
 ```bash
-python3 -m client localhost 12000 John read
+python3 -m client localhost 12000 John
+read
 ```
 
-# Licence
+## Licence
+
 This project is licenced under the GNU AGPL version 3
 
 ![AGPLv3](https://www.gnu.org/graphics/agplv3-with-text-162x68.png)