Login errors are now displayed, although crudely.

client/index.ls

@@ -512,6 +512,8 @@ socket.on-message = (event) ->
 	when "user"
 		if message.user
 			model.users[message.user.uid] := message.user
+	when "login-error"
+		model.login-error = message.error
 	else
 		console.log "RECEIVED UNKNOWN MESSAGE TYPE: #{message.type}"
 
@@ -544,6 +546,10 @@ renderer = ->
 		when "login"
 			h \div.container [
 				h \div.box [
+					if model.login-error
+						h \div.notification.is-danger [
+							model.login-error
+						]
 					h \form [
 						bulma.field [
 							bulma.label "Login"
@@ -569,6 +575,7 @@ renderer = ->
 							onclick: (e) ->
 								e.prevent-default!
 
+								model.login-error = undefined
 								socket.login model.login, model.password
 						} [ "Letsu go!" ]
 					]