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import { Schema, Model, model } from 'mongoose';
interface User {  name: string;  email: string;  avatar?: string;}
interface UserModelInterface extends Model<User> {  fetchUser(name: string): Promise<User>;}
const schema = new Schema<User>({  name: { type: String, required: true },  email: { type: String, required: true },  avatar: String});
const UserModel = model<User, UserModelInterface>('User', schema);