Authentication has been revamp, permitting authentication plugin. #1696

now permits multi-authentication (in mariadb: https://mariadb.com/kb/en/create-user/#identified-viawith-authentication_plugin / mysql: https://dev.mysql.com/doc/refman/8.0/en/multifactor-authentication.html)

Author: rusher

README.md

@@ -537,6 +537,17 @@ See [context support in the database/sql package](https://golang.org/doc/go1.8#d
 > The `QueryContext`, `ExecContext`, etc. variants provided by `database/sql` will cause the connection to be closed if the provided context is cancelled or timed out before the result is received by the driver.
 
 
+### Authentication Plugin System
+
+The driver implements a pluggable authentication system that supports various authentication methods used by MySQL and MariaDB servers. The built-in authentication plugins include:
+
+* `mysql_native_password` - The default MySQL authentication method
+* `caching_sha2_password` - Default authentication method in MySQL 8.0+
+* `mysql_clear_password` - Cleartext authentication (requires `allowCleartextPasswords=true`)
+* `mysql_old_password` - Old MySQL authentication (requires `allowOldPasswords=true`)
+* `sha256_password` - SHA256 authentication
+* `client_ed25519` - MariaDB Ed25519 authentication
+ 
 ### `LOAD DATA LOCAL INFILE` support
 For this feature you need direct access to the package. Therefore you must change the import path (no `_`):
 ```go