diff --git a/src/requests/admin.cr b/src/requests/admin.cr
index 04b0c7b..8d82f4e 100644
--- a/src/requests/admin.cr
+++ b/src/requests/admin.cr
@@ -13,7 +13,7 @@ class DNSManager::Request
 		def initialize(@key, @subject)
 		end
 
-		def handle(dnsmanagerd : DNSManager::Service, event : IPC::Event) : IPC::JSON+
+		def handle(dnsmanagerd : DNSManager::Service, event : IPC::Event) : IPC::JSON
 			# This request means serious business.
 			raise AdminAuthorizationException.new if key != dnsmanagerd.authd.key
 
diff --git a/src/requests/login.cr b/src/requests/login.cr
index 87cae57..1fd1c8d 100644
--- a/src/requests/login.cr
+++ b/src/requests/login.cr
@@ -10,15 +10,17 @@ class DNSManager::Request
 			user, _ = dnsmanagerd.decode_token token
 			dnsmanagerd.logged_users[event.fd] = user
 
+			return dnsmanagerd.storage.ensure_user_data user.uid
+
 			# In case we want to log their last connection.
 			#dnsmanagerd.auth.edit_profile_content user.uid, {
 			#	"dnsmanager-last-connection" => JSON::Any.new Time.utc.to_s
 			#}
 
-			return Response::Success.new 
+			Response::Success.new
 		rescue e
 			# FIXME: Should those be logged?
-			return Response::Error.new "unauthorized"
+			Response::Error.new "unauthorized"
 		end
 	end
 	DNSManager.requests << Login
diff --git a/src/requests/zone.cr b/src/requests/zone.cr
index 2816f08..8e6235b 100644
--- a/src/requests/zone.cr
+++ b/src/requests/zone.cr
@@ -9,8 +9,7 @@ class DNSManager::Request
 		def initialize(@zone)
 		end
 
-		def handle(dnsmanagerd : DNSManager::Service, event : IPC::Event)
-			return Response::Success.new
+		def handle(dnsmanagerd : DNSManager::Service, event : IPC::Event) : IPC::JSON
 			user = dnsmanagerd.get_logged_user event
 			raise NotLoggedException.new if user.nil?
 			dnsmanagerd.storage.add_or_update_zone user.uid, zone
@@ -24,8 +23,7 @@ class DNSManager::Request
 		def initialize(@domain)
 		end
 
-		def handle(dnsmanagerd : DNSManager::Service, event : IPC::Event)
-			return Response::Success.new
+		def handle(dnsmanagerd : DNSManager::Service, event : IPC::Event) : IPC::JSON
 			user = dnsmanagerd.get_logged_user event
 			raise NotLoggedException.new if user.nil?
 			dnsmanagerd.storage.delete_domain user.uid, @domain
diff --git a/src/storage.cr b/src/storage.cr
index edd9e53..8df6312 100644
--- a/src/storage.cr
+++ b/src/storage.cr
@@ -44,8 +44,17 @@ class DNSManager::Storage
 		user_data_by_uid.update_or_create user_data.uid.to_s, user_data
 	end
 
-	def add_or_update_zone(user_id : Int32, zone : Zone)
+	def ensure_user_data(user_id : Int32)
+		user_data = user_data_by_uid.get? user_id.to_s
+		unless user_data
+			Baguette::Log.info "New user #{user_id}"
+			@user_data << Storage::UserData.new user_id
+		end
 
+		Response::Success.new
+	end
+
+	def add_or_update_zone(user_id : Int32, zone : Zone) : IPC::JSON
 		# Test zone validity.
 		if errors = zone.get_errors?
 			Baguette::Log.warning "zone #{zone.domain} update with errors: #{errors}"
@@ -66,12 +75,6 @@ class DNSManager::Storage
 				Baguette::Log.warning "user #{user_id} doesn't own domain #{zone.domain}"
 				return Response::NoOwnership.new
 			end
-
-			# Domain cannot change (for security reasons).
-			unless z.domain == zone.domain
-				Baguette::Log.warning "user #{user_id} tries to change domain #{z.domain} by #{zone.domain}"
-				return Response::DomainChanged.new
-			end
 		else
 			# Add the domain to the user's domain.
 			user_data.domains << zone.domain
@@ -89,7 +92,7 @@ class DNSManager::Storage
 		Response::Error.new "error while updating the domain #{zone.domain}"
 	end
 
-	def delete_domain(user_id : Int32, domain : String)
+	def delete_domain(user_id : Int32, domain : String) : IPC::JSON
 		# User must exist.
 		user_data = user_data_by_uid.get? user_id.to_s
 		unless user_data