feat: auto gen user code

prisma/schema.prisma

@@ -73,7 +73,7 @@ enum Status {
 
 model Branch {
   id        String @id @default(uuid())
-  code      String @default(uuid())
+  code      String
   taxNo     String
   name      String
   nameEN    String
@@ -143,12 +143,19 @@ model BranchUser {
   updatedAt DateTime @updatedAt
 }
 
+enum UserType {
+  USER
+  MESSENGER
+  DELEGATE
+  AGENCY
+}
+
 model User {
   id String @id @default(uuid())
 
   keycloakId String
 
-  code        String @default(uuid())
+  code        String?
   firstName   String
   firstNameEN String
   lastName    String
@@ -177,7 +184,7 @@ model User {
   startDate  DateTime?
   retireDate DateTime?
 
-  userType String
+  userType UserType
   userRole String
 
   discountCondition String?
@@ -203,7 +210,7 @@ model User {
 
 model Customer {
   id             String  @id @default(uuid())
-  code           String  @default(uuid())
+  code           String
   customerType   String
   customerName   String
   customerNameEN String