% export DBUSER=username
% export DBPASS=password
% go run .
[mysql] 2022/01/10 17:16:10 connector.go:95: could not use requested auth plugin 'mysql_native_password': this user requires mysql native password authentication.
2022/01/10 17:16:10 this user requires mysql native password authentication.
exit status 1

(before)
cfg := mysql.Config{
    User:   os.Getenv("DBUSER"),
    Passwd: os.Getenv("DBPASS"),
    Net:    "tcp",
    Addr:   "127.0.0.1:3306",
    DBName: "recordings",
}

(after)
cfg := mysql.Config{
    User:   os.Getenv("DBUSER"),
    Passwd: os.Getenv("DBPASS"),
    Net:    "tcp",
    Addr:   "127.0.0.1:3306",
    DBName: "recordings",
    AllowNativePasswords: true, // Add this line.
}

% go run .
2022/01/10 17:18:16 Error 1045: Access denied for user 'username'@'localhost' (using password: YES)
exit status 1

mysql> grant all on *.* to username@localhost;

% go run .
Connected!
Albums found: [{1 Blue Train John Coltrane 56.99} {2 Giant Steps John Coltrane 63.99}]
Album found: {2 Giant Steps John Coltrane 63.99}
ID of added album: 5

AllowNativePasswords: true,