BindUser Method
Binds a new UserID to the Key.
Syntax
pgpkeymanager.bindUser(username, [callback])
Callback
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
function(err){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
err.code err.message
Remarks
Use this method to add a new Username as an owner of the Key.
Note that the key needs to contain its secret counterpart to be able to sign the new user ID.