diff --git a/auth_utils.py b/auth_utils.py
new file mode 100644
index 00000000..b8af071c
--- /dev/null
+++ b/auth_utils.py
@@ -0,0 +1,46 @@
+import jwt
+from hashlib import md5
+
+# see: settings.py
+JWT_SECRET_KEY = "my secret key"
+JWT_ALGORITHM = "HS256"
+
+JWT_AUTH_HEADER = "HTTP_AUTHORIZATION"
+
+
+# see: auth.password.Password
+def password_to_hash(password):
+	return md5(password.encode('utf-8')).hexdigest()
+
+def verify_password(password, hash):
+	return password_to_hash(password) == hash
+
+# see: auth.auth.token.Token
+def jwt_encode(user):
+	payload = {
+		"user_id" : user.id
+	}
+	
+	token = jwt.encode(payload, JWT_SECRET_KEY, JWT_ALGORITHM)
+	
+	if isinstance(token, bytes):
+		return token.decode('utf-8')
+
+	return token
+
+def jwt_decode(token):
+	try:
+		payload = jwt.decode(token, JWT_SECRET_KEY, algorithms = [JWT_ALGORITHM])
+	except jwt.DecodeError:
+		raise Exception("Error decoding signature")
+	except jwt.InvalidTokenError:
+		raise Exception("Invalid token")
+		
+	user_id = payload["user_id"]
+	return user_id
+	
+# see: auth.authorize
+def authorize(request):
+	token = request.headers.get(JWT_AUTH_HEADER, '')
+	user_id = jwt_decode(token)
+	return user_id
diff --git a/message_service.py b/message_service.py
index 447d274d..5a1698f3 100644
--- a/message_service.py
+++ b/message_service.py
@@ -11,6 +11,9 @@ from peewee import *
 
 import asyncio
 
+import auth_utils
+
+
 type_defs = load_schema_from_path("schema.graphql")
 
 db = SqliteDatabase('discours.db')
@@ -19,6 +22,16 @@ class User(Model):
 	username = CharField()
 	email = CharField()
 	createdAt = DateTimeField(default=datetime.now)
+	muted = BooleanField(default=False)
+	rating = IntegerField(default=0)
+	# roles = 
+	updatedAt = DateTimeField(default=datetime.now)
+	username = CharField()
+	userpic = CharField(default="")
+	userpicId = CharField(default="")
+	wasOnlineAt = DateTimeField(default=datetime.now)
+	
+	password = CharField()
 
 	class Meta:
 		database = db
@@ -38,7 +51,11 @@ class Message(Model):
 db.connect()
 db.create_tables([User, Message])
 
-#only_user = User.create(username = "admin", email = "knst.kotov@gmail.com")
+#only_user = User.create(
+#	username = "admin",
+#	email = "knst.kotov@gmail.com",
+#	password = auth_utils.password_to_hash("12345")
+#)
 only_user = User.get(User.username == "admin")
 
 
@@ -65,17 +82,43 @@ def resolve_get_messages(_, info, count, page):
 
 mutation = MutationType()
 
+@mutation.field("signIn")
+def resolve_sign_in(_, info, email, password):
+	try:
+		user = User.get(User.email == email)
+	except DoesNotExist as err:
+		return {
+			"status" : False,
+			"error" : "invalid username or password"
+		}
+		
+	if auth_utils.verify_password(password, user.password) :
+		return {
+			"status" : True,
+			"token" : auth_utils.jwt_encode(user)
+		}
+		
+	return {
+		"status" : False,
+		"error" : "invalid username or password"
+	}
+
 @mutation.field("createMessage")
 def resolve_create_message(_, info, input):
+	request = info.context["request"]
+	
 	try:
+		user_id = auth_utils.authorize(request)
+		user = User.get(User.id == user_id)
+		
 		new_message = Message.create(
-			author = only_user,
+			author = user,
 			body = input["body"],
 			replyTo = input.get("replyTo")
 		)
 	except Exception as err:
 		return {
-			"status" : false,
+			"status" : False,
 			"message" : err
 		}
 	
@@ -90,6 +133,17 @@ def resolve_create_message(_, info, input):
 
 @mutation.field("updateMessage")
 def resolve_update_message(_, info, input):
+	request = info.context["request"]
+	
+	try:
+		user_id = auth_utils.authorize(request)
+		user = User.get(User.id == user_id)
+	except Exception as err:
+		return {
+			"status" : False,
+			"message" : err
+		}
+		
 	message_id = input["id"]
 	body = input["body"]
 	
@@ -101,6 +155,12 @@ def resolve_update_message(_, info, input):
 	
 	updated_message = all_messages[message_id]
 	
+	if updated_message.author != user:
+		return {
+			"status" : False,
+			"error" : "update this message denied"
+		}
+	
 	updated_message.body = body
 	#updated_message.updatedAt = datetime.now
 	try:
diff --git a/schema.graphql b/schema.graphql
index 79a55f1f..f882b49e 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -160,4 +160,4 @@ type Like {
     shout: Int
     user: Int
     value: Int!
-}
\ No newline at end of file
+}