-int auth_set_password(const char *, const char *);
-int auth_get_password_version(const char *);
-int auth_get_password(const char *, char *);
-int auth_get_salt(const char *, char *);
-int auth_check_password(const char *, const char *);
+int auth_set_password(const char *username, const char *password);
+int auth_get_password_version(const char *username);
+int auth_get_password(const char *username, char *password);
+int auth_get_salt(const char *username, uint8_t *salt);
+int auth_check_password(const char *username, const char *password);