adds user db model

prisma/schema.prisma

@@ -14,8 +14,10 @@ datasource db {
 }
 
 model GameSystem {
-  id      String   @id @default(cuid())
-  schemas Schema[]
+  id       String   @id @default(cuid())
+  schemas  Schema[]
+  author   User     @relation(fields: [authorId], references: [id])
+  authorId String
 
   name    String   @unique
   created DateTime @default(now())
@@ -26,6 +28,8 @@ model Schema {
   gameSystem   GameSystem    @relation(fields: [gameSystemId], references: [id])
   gameSystemId String
   publications Publication[]
+  author       User          @relation(fields: [authorId], references: [id])
+  authorId     String
 
   originalId String
   name       String
@@ -39,6 +43,8 @@ model Publication {
   schema   Schema @relation(fields: [schemaId], references: [id])
   schemaId String
   tags     Tag[]
+  author   User   @relation(fields: [authorId], references: [id])
+  authorId String
 
   name String
   data Json
@@ -49,3 +55,13 @@ model Tag {
   publication   Publication @relation(fields: [publicationId], references: [id])
   publicationId String
 }
+
+model User {
+  id           String        @id @default(cuid())
+  schemas      Schema[]
+  gameSystems  GameSystem[]
+  publications Publication[]
+
+  username String
+  email    String @unique
+}