Authentication (Maven Artifact Resolver 1.3.2 API)

```
public interface Authentication
```
The authentication to use for accessing a protected resource. This acts basically as an extensible callback mechanism from which network operations can request authentication data like username and password when needed.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`digest(AuthenticationDigest digest)`	Updates the given digest with data from this authentication callback.
`void`	`fill(AuthenticationContext context, String key, Map<String,String> data)`	Fills the given authentication context with the data from this authentication callback.

- Method Detail
  - fill
```
void fill(AuthenticationContext context,
          String key,
          Map<String,String> data)
```
    Fills the given authentication context with the data from this authentication callback. To do so, implementors have to call AuthenticationContext.put(String, Object).
    
    The key parameter supplied to this method acts merely as a hint for interactive callbacks that want to prompt the user for only that authentication data which is required. Implementations are free to ignore this parameter and put all the data they have into the authentication context at once.
    
    Parameters:
    
    context - The authentication context to populate, must not be null.
    
    key - The key denoting a specific piece of authentication data that is being requested for a network operation, may be null.
    
    data - Any (read-only) extra data in form of key value pairs that might be useful when getting the authentication data, may be null.
  - digest
```
void digest(AuthenticationDigest digest)
```
    Updates the given digest with data from this authentication callback. To do so, implementors have to call the update() methods in AuthenticationDigest.
    
    Parameters:
    
    digest - The digest to update, must not be null.