데모용 임시 회원가입 구현

src/lib/server/db/user.ts

@@ -7,6 +7,15 @@ interface User {
   password: string;
 }
 
+export const createUser = async (email: string, nickname: string, password: string) => {
+  const { id } = await db
+    .insertInto("user")
+    .values({ email, nickname, password })
+    .returning("id")
+    .executeTakeFirstOrThrow();
+  return { id, email, nickname, password } satisfies User;
+};
+
 export const getUser = async (userId: number) => {
   const user = await db
     .selectFrom("user")