Why Does My Node.JS App Get a 'Client Does Not Support Authentication Protocol' Error When Connecting to MySQL 8.0?

MySQL 8.0 Authentication Error: Client Support Required

When attempting to establish a connection to a MySQL 8.0 database from Node.JS, you may encounter an error stating: "Client does not support authentication protocol requested by server; consider upgrading MySQL client." This error indicates a compatibility issue between your MySQL client and the server's authentication mechanism.

The provided Node.JS code attempts to establish a connection with insecure authentication, but this is incompatible with MySQL 8.0's default authentication protocol. To resolve this issue, follow these steps:

1. Execute the following query in MySQL Workbench:

   ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

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   Replace 'root' with your username, 'localhost' with your host address, and 'password' with your password.

2. Refresh privileges using this query:

   flush privileges;

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3. Attempt to connect from Node.JS again.

If the error persists, try executing the same query without the '@'

ALTER USER 'root' IDENTIFIED WITH mysql_native_password BY 'password';

Ensure you keep your MySQL client up-to-date to avoid encountering similar authentication issues in the future.

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