loadUserByUsername
public UserDetails loadUserByUsername(java.lang.String username)
Locates the user based on the username. In the actual implementation, the search
 may possibly be case sensitive, or case insensitive depending on how the
 implementation instance is configured. In this case, the UserDetails
 object that comes back may have a username that is of a different case than what
 was actually requested..
- Specified by:
 
loadUserByUsername in interface UserDetailsService 
- Parameters:
 
username - the username identifying the user whose data is required. 
- Returns:
 
- a fully populated user record (never 
null)