text: const { model, Schema } = require("mongoose");
  
  const userSchema = new Schema(
      {
          username: { type: String, required: true, unique: true },
          email: { type: String, required: true },
          password_digest: { type: String, required: true }
      },
      { timestamps: true }
  );
  
  module.exports = model("User", userSchema);