UserService (OpenEMS Javadoc)

All Known Implementing Classes:

DummyUserService, UserServiceImpl
```
public interface UserService
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.Optional<User>`	`authenticate(java.lang.String password)`	Authenticates a user with his password.
`java.util.Optional<User>`	`authenticate(java.lang.String username, java.lang.String password)`	Authenticates a user with his username and password.

- Method Detail
  - authenticate
```
java.util.Optional<User> authenticate(java.lang.String password)
```
    Authenticates a user with his password.
    
    Parameters:
    
    password - the password
    
    Returns:
    
    the authenticated User or Empty if authentication failed
  - authenticate
```
java.util.Optional<User> authenticate(java.lang.String username,
                                      java.lang.String password)
```
    Authenticates a user with his username and password.
    
    Parameters:
    
    username - the username
    
    password - the password
    
    Returns:
    
    the authenticated User or Empty if authentication failed