public ByteSource getCredentialsSalt() {
        return this.authcInfo.getCredentialsSalt();
    }
Returns the salt used to hash this Account's credentials (e.g. for password hashing), or {@code null} if no salt
was used or credentials were not hashed at all.

@return the salt used to hash this Account's credentials (e.g. for password hashing), or {@code null} if no salt
was used or credentials were not hashed at all.
@since 1.1
core/src/main/java/org/apache/shiro/authc/SimpleAccount.java