Cisco ASA 5512-X Allow outside/external ssh access

To enable external SSH access to a brand new Cisco ASA 5512-X, follow these example instructions:
X.X.X.X is the IP address you wish to allow access from.
yourusername is the username you want to use
XXXXXXXXXXXXXXXXX is your password

ciscoasa# conf t
ciscoasa(config)# ssh X.X.X.X 255.255.255.255 outside
ciscoasa(config)# crypto key generate rsa general-keys modulus 2048
ciscoasa(config)# username yourusername password XXXXXXXXXXXXXXXXX
ciscoasa(config)# aaa authentication ssh console LOCAL
ciscoasa(config)# ssh version 2

You may also want to set an enable password:
ciscoasa(config)# enable password XXXXXXXXXXXXXXXXX
(You should probably make this different to your user password)