add creator column

@@ -9,26 +9,29 @@ datasource db {
 }
 
 model User {
-  id             Int             @default(autoincrement()) @id
-  avatarUrl      String?         @default("")
-  username       String
-  email          String          @unique
-  password       String
-  phoneNum       String          @default("") @unique
-  emailSecret    String?         @default("")
-  phoneSecret    String?         @default("")
-  bio            String?         @default("")
-  groups         Group[]         @relation(references: [id])
-  messages       Message[]
-  directMessages DirectMessage[]
-  createdAt      DateTime?       @default(now())
+  id                Int             @default(autoincrement()) @id
+  avatarUrl         String?         @default("")
+  username          String
+  email             String          @unique
+  password          String
+  phoneNum          String          @default("") @unique
+  emailSecret       String?         @default("")
+  phoneSecret       String?         @default("")
+  bio               String?         @default("")
+  participatedGroup Group[]         @relation("group-participants", references: [id])
+  createdGroup      Group[]         @relation("group-creator")
+  messages          Message[]
+  directMessages    DirectMessage[]
+  createdAt         DateTime?       @default(now())
 }
 
 model Group {
   id           Int       @default(autoincrement()) @id
   name         String    @unique
-  participants User[]
+  participants User[]    @relation("group-participants")
   messages     Message[]
+  creator      User      @relation("group-creator", fields: [creatorId])
+  creatorId    Int
   files        String?   @default("")
   createdAt    DateTime? @default(now())
 }