diff --git a/.gitignore b/.gitignore
index eb41397..beb137b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,6 @@ __pycache__/
 .env
 !.env.example
 
+load.txt
+
 .DS_Store
diff --git a/generate.py b/generate.py
index 051cb69..185be4d 100644
--- a/generate.py
+++ b/generate.py
@@ -1,21 +1,31 @@
 import psycopg2, os
+import random, string
 from getpass import getpass
+from util.auth_lib import hash
 from util.config import conn_param
+from service.auth_service import AuthData, AuthService
+
+def gen_salt(length = 20):
+   letters = string.ascii_lowercase + string.digits + string.punctuation
+   return ''.join(random.choice(letters) for i in range(length))
 
 def __main__():
 	conn = psycopg2.connect(conn_param)
 	cur = conn.cursor()
 
 	try:
-		open("./load.txt", "r")
+		f = open("./load.txt", "r")
+		if f.read().split("=")[1] == "false":
+			raise ValueError("value not true")
+
 		print("server already initialized")
 	except: 
 		cur.execute(
 			"""
-			create table account(
+			create table if not exists account(
 				name varchar(25),
-				username varchar(25),
-				password varchar(50) not null,
+				username varchar(25) not null,
+				password varchar(100) not null,
 				salt varchar(50),
 				primary key(username)
 			);
@@ -24,7 +34,7 @@ def __main__():
 
 		cur.execute(
 			"""
-			create table balset(
+			create table if not exists balset(
 				id serial primary key,
 				uid varchar(25) not null,
 				name varchar(50),
@@ -42,13 +52,29 @@ def __main__():
 
 		conn.commit()
 
+		cur.close()
+		conn.close()
+
 		name = input("input your display name: ")
 		username = input("input your username: ")
 		password = getpass("input your password: ")
 		passchk = getpass("type password one more time: ")
+		salt = gen_salt()
+
+		if password != passchk:
+			return
+		
+		hashed_password = hash(password, salt)
+		packed = AuthData(
+			name=name,
+			username=username,
+			password=hashed_password,
+			salt=salt
+		)
+
+		service = AuthService()
+		service.create(data=packed)
 
-		cur.close()
-		conn.close()
 		f = open("load.txt", "w")
 		f.write("init=true")
 
diff --git a/load.txt b/load.txt
deleted file mode 100644
index c254184..0000000
--- a/load.txt
+++ /dev/null
@@ -1 +0,0 @@
-init=true
\ No newline at end of file
diff --git a/service/auth_service.py b/service/auth_service.py
index dbe37ff..e31a09b 100644
--- a/service/auth_service.py
+++ b/service/auth_service.py
@@ -8,11 +8,11 @@ class AuthData:
 	username: str
 	password: str
 	salt: str
-
-class Register:
-	name: str
-	username: str
-	password: str
+	def __init__(self, name: str, username: str, password: str, salt: str):
+		self.name = name
+		self.username = username
+		self.password = password
+		self.salt = salt
 
 class Credential(BaseModel):
 	username: str
@@ -22,9 +22,28 @@ class AuthService:
 	def __init__(self):
 		self._conn = psycopg2.connect(conn_param)
 
+	def create(self, data: AuthData):
+		cur = self._conn.cursor()
+
+		try:
+			if data.username == "" or data.password == "":
+				raise ValueError("username or password must not be null")
+
+			cur.execute(
+				"insert into account (name, username, password, salt) values (%s, %s, %s, %s)",
+				(data.name, data.username, data.password, data.salt)
+			)
+
+			self._conn.commit()
+		except:
+			self._conn.rollback()
+			raise RuntimeError("create account failed")
+		finally:
+			cur.close()
+			self._conn.close()
+
 	def read(self, username: str):
 		cur = self._conn.cursor()
-		
 		cur.execute("select * from account where username = %s;", (username))
 		data = cur.fetchone()
 		if data == None:
diff --git a/util/auth_lib.py b/util/auth_lib.py
index 5f24356..1d7078d 100644
--- a/util/auth_lib.py
+++ b/util/auth_lib.py
@@ -2,7 +2,11 @@ import base64
 from hashlib import sha256
 
 def hash(password: str, salt: str):
-	return sha256("{}:{}".format(password, salt))
+	m = sha256()
+	m.update("{}:{}".format(password, salt).encode())
+	
+	return m.hexdigest()
+	
 
 def gen_token(username: str, hashed_password: str):
 	raw = ("{}:{}".format(username, hashed_password)).encode("utf-8")