Update README with new API

README.md

@@ -30,17 +30,57 @@ Chookpen is very simple in how it works at present. There's only one chat on eac
 
 ### Brief API documentation for the server
 
-**Create account**
+#### Create account
+
+**Usage**
 
 `http://(address:port)/api/createAccount/username:{(username)}token:{(password-hash)}`
 
-**Send a message**
+**Successful response**
 
-`http://(address:port)/api/username:{(username)}token:{(password-hash)}message:{(message to send)}`
+`Success`
 
-**Get messages**
+**Unsuccessful responses**
 
-`http://(address:port)/api/username:{(username)}token:{(password-hash)}`
+`Username already exists` - Choose a new username
+
+`No username` - Add a username
+
+`No token` - Add a token
+
+#### Send a message
+
+**Usage**
+
+`http://(address:port)/api/send/username:{(username)}token:{(password-hash)}message:{(message to send)}`
+
+**Successful response**
+
+`Success`
+
+**Unsuccessful responses**
+
+`Unknown account` - Either you don't have an account or your username is wrong
+
+`Invalid token` - Password is wrong
+
+`No data provided` - Add a message
+
+#### Get messages
+
+**Usage**
+
+`http://(address:port)/api/syncmessages/username:{(username)}token:{(password-hash)}`
+
+**Successful response**
+
+A successful response should contain everything in `chatHistory` in the directory you run the server in.
+
+**Unsuccessful responses**
+
+`Unknown account` - Either you don't have an account or your username is wrong
+
+`Invalid token` - Password is wrong
 
 ## Some handy tips and tricks