A HandshakeResponse41 packet is sent by the client to initiate the authentication process.
int sequenceId: the sequence ID for the packet.
String packetType: always "HandshakeResponse41" - read-only.
int capabilityFlags: the client's capabilities. The meaning of these flags is described in the MySQL documentation.
boolean isSSLRequest: true if the client is requesting an SSL connection
int maxPacketSize: the maximum packet size for the client
int characterSet: the default character set for the client. The meaning of this code is available in the MySQL documentation.
String userName: the name of the user logging in
byte authResponse: the initial authentication data
String database: the name of the database to use as default after login
String authPluginName: the name of the authentication plugin used by the client
Object clientConnectAttributes: all the attributes for the login