How do I only allow a specific email address to register

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schema

mongoose

This is my schema, how would I allow only specific email to register. For example, only people with an email address ending in gmail.com can register

import mongoose from "mongoose";



const UserSchema = new mongoose.Schema(
	{
		name: {
			type: String,
			required: true
		},
		email: {
			type: String,
			required: [true, "Please enter your email"],
			unique: true,
			
		},
		password: {
			type: String,
			required: true,
			minlength: 5,
		},

	},
	{ collection: 'user-data' }
)

export default mongoose.model('User', UserSchema)

What I have tried:

I have tried to use regex

'^[a-zA-Z0-9_.+-]+@(?:(?:[a-zA-Z0-9-]+\.)?[a-zA-Z]+\.)?(gmail)\.com$'