vertx / io.vertx.ext.auth.mongo / HashStrategy / getSalt

# getSalt

`abstract fun getSalt(user: User): String`

Retrieve the salt. The source of the salt can be the external salt or the propriate column of the given user, depending on the defined HashSaltStyle

### Parameters

`user` - the user to get the salt for. This paramter is needed, if the `HashSaltStyle#COLUMN` is declared to be used

Return
null in case of `HashSaltStyle#NO_SALT` the salt of the user or a defined external salt