comty/packages/server/services/auth/routes/availability/get.js

import { User } from "@db_models"

export default async (req) => {
    const { username, email } = req.query

    if (!username && !email) {
        throw new OperationError(400, "Missing username or email")
    }

    const user = await User.findOne({
        $or: [
            { username: username },
            { email: email },
        ]
    }).catch((error) => {
        return false
    })

    if (user) {
        return {
            message: "User already exists",
            exists: true,
        }
    } else {
        return {
            message: "User doesn't exists",
            exists: false,
        }
    }
}