Adding login admin, fix ipv6 Vienamese version, add env example

models/User.ts

@@ -0,0 +1,18 @@
+import mongoose, { Schema, Document } from "mongoose";
+
+export interface IUser extends Document {
+  email: string;
+  password: string;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+const UserSchema: Schema = new Schema(
+  {
+    email: { type: String, required: true, unique: true },
+    password: { type: String, required: true },
+  },
+  { timestamps: true }
+);
+
+export default mongoose.models.User || mongoose.model<IUser>("User", UserSchema);