Add email to user

prisma/schema.prisma

@@ -17,12 +17,13 @@ model user {
   id   Int    @id @unique @default(autoincrement())
   name String @unique
   code String?
+  email String?
 
   // TODO: Prüfen ob nötig, erstmal vorbereitet.
   transactions transactions[]
 
   @@fulltext([name])
-}
+} 
 
 model transactions {
   id Int @id @unique @default(autoincrement())
@@ -62,3 +63,5 @@ model products {
 
   @@fulltext([name])
 }
+
+// TODO: migrate all ids to uuid?