[Fixed] Access Denied Issue

[sergomen]

If you are still struggling with this error, you can do as I did.

models/user.js:

username: {
        type: String,
        required: [true, 'Username is required!'],
        // changed it from 8,20 to 3,20
        match: [/^(?=.{3,20}$)(?![_.])(?!.*[_.]{2})[a-zA-Z0-9._\u0400-\u04FF]+(?<![_.])$/, "Username invalid, it should contain 3-20 alphanumeric letters and be unique!"]
        // [/^(?=.{8,20}$)(?![_.])(?!.*[_.]{2})[a-zA-Z0-9._]+(?<![_.])$/, "Username invalid, it should contain 8-20 alphanumeric letters and be unique!"]
    },

utils/database.js:

import mongoose from 'mongoose';

let isConnected = false;

export const connectToDB = async () => {
    // mongoose.SchemaTypes('strictQuery', true);  <-------------- mongoose.SchemaTypes is not a function in Mongoose

    if (isConnected) {
        console.log('MongoDB is already connected');
        return; // to stop if it's running
    }

    try {
        await mongoose.connect(process.env.MONGODB_URI, {
            dbName: "share-prompt",
            // useNewUrlParser: true,         <-------------- deprecated  
            // useUnifiedTopology: true,       <-------------- deprecated
        });

        isConnected = true;

        console.log('MongoDB connected');
    } catch (error) {
        console.log(error);
    }
}

Also, other people make a mistake in .env file. You have to write username and password for you mongodb string without <>:

MONGODB_URI=mongodb+srv://username:password@cluster0.bx2ss.mongodb.net/?retryWrites=true&w=majority&appName=Cluster0

Hope it will help. Happy coding.