Database Error

What This Error Means

This error occurs when the MongoDB client is unable to authenticate with the database using the specified mechanisms and credentials.

Why It Happens

This error typically happens when the username, password, or authentication mechanism is incorrect, or when the MongoDB instance is not properly configured for authentication.

How to Fix It

1. 1To fix this error, ensure that the username and password are correct, and that the authentication mechanism is supported by the MongoDB instance. You can do this by verifying the MongoDB connection string and updating it to use a supported mechanism, such as 'SCRAM-SHA-1' or 'MONGODB-CR'. Additionally, ensure that the 'authSource' option is set to the correct database name, and that the 'user' option is set to the correct username.

Example Code Solution

const client = new MongoClient('mongodb://localhost:27017/');
const db = client.db();

const client = new MongoClient('mongodb://admin:password@localhost:27017/?authSource=admin&authMechanism=SCRAM-SHA-1');
const db = client.db();