feat: add credentials authentication (#1)

packages/validation/src/index.ts

@@ -0,0 +1 @@
+export * from "./user";

packages/validation/src/user.ts

@@ -0,0 +1,20 @@
+import { z } from "zod";
+
+const usernameSchema = z.string().min(3).max(255);
+const passwordSchema = z.string().min(8).max(255);
+
+export const initUserSchema = z
+  .object({
+    username: usernameSchema,
+    password: passwordSchema,
+    repeatPassword: z.string(),
+  })
+  .refine((data) => data.password === data.repeatPassword, {
+    path: ["repeatPassword"],
+    message: "Passwords do not match",
+  });
+
+export const signInSchema = z.object({
+  name: z.string(),
+  password: z.string(),
+});