diff --git a/pbs-api-types/src/upid.rs b/pbs-api-types/src/upid.rs
index 5666df1e..9447b8a0 100644
--- a/pbs-api-types/src/upid.rs
+++ b/pbs-api-types/src/upid.rs
@@ -2,7 +2,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 
 use anyhow::{bail, Error};
 
-use proxmox::api::schema::{ApiStringFormat, Schema, StringSchema};
+use proxmox::api::schema::{ApiStringFormat, ApiType, Schema, StringSchema};
 use proxmox::const_regex;
 use proxmox::sys::linux::procfs;
 
@@ -54,13 +54,15 @@ const_regex! {
 pub const PROXMOX_UPID_FORMAT: ApiStringFormat =
     ApiStringFormat::Pattern(&PROXMOX_UPID_REGEX);
 
-impl UPID {
-    pub const API_SCHEMA: Schema = StringSchema::new("Unique Process/Task Identifier")
+impl ApiType for UPID {
+    const API_SCHEMA: Schema = StringSchema::new("Unique Process/Task Identifier")
         .min_length("UPID:N:12345678:12345678:12345678:::".len())
         .max_length(128) // arbitrary
         .format(&PROXMOX_UPID_FORMAT)
         .schema();
+}
 
+impl UPID {
     /// Create a new UPID
     pub fn new(
         worker_type: &str,
diff --git a/pbs-api-types/src/userid.rs b/pbs-api-types/src/userid.rs
index 8418f13e..5ecae4df 100644
--- a/pbs-api-types/src/userid.rs
+++ b/pbs-api-types/src/userid.rs
@@ -30,7 +30,7 @@ use lazy_static::lazy_static;
 use serde::{Deserialize, Serialize};
 
 use proxmox::api::api;
-use proxmox::api::schema::{ApiStringFormat, Schema, StringSchema, Updatable};
+use proxmox::api::schema::{ApiStringFormat, ApiType, Schema, StringSchema, Updatable};
 use proxmox::const_regex;
 
 // we only allow a limited set of characters
@@ -409,13 +409,15 @@ impl Updatable for Userid {
     const UPDATER_IS_OPTION: bool = true;
 }
 
-impl Userid {
-    pub const API_SCHEMA: Schema = StringSchema::new("User ID")
+impl ApiType for Userid {
+    const API_SCHEMA: Schema = StringSchema::new("User ID")
         .format(&PROXMOX_USER_ID_FORMAT)
         .min_length(3)
         .max_length(64)
         .schema();
+}
 
+impl Userid {
     const fn new(data: String, name_len: usize) -> Self {
         Self { data, name_len }
     }
@@ -538,13 +540,22 @@ pub struct Authid {
     tokenname: Option<Tokenname>
 }
 
-impl Authid {
-    pub const API_SCHEMA: Schema = StringSchema::new("Authentication ID")
+
+impl Updatable for Authid {
+    type Updater = Option<Authid>;
+
+    const UPDATER_IS_OPTION: bool = true;
+}
+
+impl ApiType for Authid {
+    const API_SCHEMA: Schema = StringSchema::new("Authentication ID")
         .format(&PROXMOX_AUTH_ID_FORMAT)
         .min_length(3)
         .max_length(64)
         .schema();
+}
 
+impl Authid {
     const fn new(user: Userid, tokenname: Option<Tokenname>) -> Self {
         Self { user, tokenname }
     }
diff --git a/src/api2/config/datastore.rs b/src/api2/config/datastore.rs
index aa754808..b0a5b0d2 100644
--- a/src/api2/config/datastore.rs
+++ b/src/api2/config/datastore.rs
@@ -6,7 +6,7 @@ use ::serde::{Deserialize, Serialize};
 
 use proxmox::api::{api, Router, RpcEnvironment, Permission};
 use proxmox::api::section_config::SectionConfigData;
-use proxmox::api::schema::parse_property_string;
+use proxmox::api::schema::{ApiType, parse_property_string};
 use pbs_datastore::task::TaskState;
 
 use crate::api2::config::sync::delete_sync_job;
diff --git a/src/api2/types/acme.rs b/src/api2/types/acme.rs
index 87b86537..4370d6a6 100644
--- a/src/api2/types/acme.rs
+++ b/src/api2/types/acme.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
-use proxmox::api::{api, schema::{Schema, StringSchema, ApiStringFormat}};
+use proxmox::api::{api, schema::{ApiType, Schema, StringSchema, ApiStringFormat}};
 
 use crate::api2::types::{
     DNS_ALIAS_FORMAT, DNS_NAME_FORMAT, PROXMOX_SAFE_ID_FORMAT,
diff --git a/src/api2/types/tape/media_location.rs b/src/api2/types/tape/media_location.rs
index 031369e3..6040655a 100644
--- a/src/api2/types/tape/media_location.rs
+++ b/src/api2/types/tape/media_location.rs
@@ -35,8 +35,8 @@ pub enum MediaLocation {
 proxmox::forward_deserialize_to_from_str!(MediaLocation);
 proxmox::forward_serialize_to_display!(MediaLocation);
 
-impl MediaLocation {
-    pub const API_SCHEMA: Schema = StringSchema::new(
+impl proxmox::api::schema::ApiType for MediaLocation {
+    const API_SCHEMA: Schema = StringSchema::new(
         "Media location (e.g. 'offline', 'online-<changer_name>', 'vault-<vault_name>')")
         .format(&ApiStringFormat::VerifyFn(|text| {
             let location: MediaLocation = text.parse()?;
diff --git a/src/bin/docgen.rs b/src/bin/docgen.rs
index 3a387e1c..1fba9baf 100644
--- a/src/bin/docgen.rs
+++ b/src/bin/docgen.rs
@@ -4,6 +4,7 @@ use serde_json::{json, Value};
 use proxmox::{
     api::{
         schema::{
+            ApiType,
             Schema,
             ObjectSchemaType,
             ApiStringFormat,
diff --git a/src/bin/proxmox_backup_client/benchmark.rs b/src/bin/proxmox_backup_client/benchmark.rs
index 442bd03f..9f205c27 100644
--- a/src/bin/proxmox_backup_client/benchmark.rs
+++ b/src/bin/proxmox_backup_client/benchmark.rs
@@ -16,6 +16,7 @@ use proxmox::api::{
         default_table_format_options,
     },
     router::ReturnType,
+    schema::ApiType,
 };
 
 use pbs_client::tools::key_source::get_encryption_key_password;
diff --git a/src/bin/proxmox_backup_client/key.rs b/src/bin/proxmox_backup_client/key.rs
index cd2958ba..c06926e3 100644
--- a/src/bin/proxmox_backup_client/key.rs
+++ b/src/bin/proxmox_backup_client/key.rs
@@ -10,6 +10,7 @@ use proxmox::api::cli::{
     OUTPUT_FORMAT,
 };
 use proxmox::api::router::ReturnType;
+use proxmox::api::schema::ApiType;
 use proxmox::sys::linux::tty;
 use proxmox::tools::fs::{file_get_contents, replace_file, CreateOptions};
 
diff --git a/src/config/datastore.rs b/src/config/datastore.rs
index 5409c7c2..cfa03547 100644
--- a/src/config/datastore.rs
+++ b/src/config/datastore.rs
@@ -5,7 +5,7 @@ use serde::{Serialize, Deserialize};
 
 use proxmox::api::{
     api,
-    schema::{Schema, StringSchema, Updater},
+    schema::{ApiType, Schema, StringSchema, Updater},
     section_config::{
         SectionConfig,
         SectionConfigData,
diff --git a/src/config/node.rs b/src/config/node.rs
index c03078bb..a46aabed 100644
--- a/src/config/node.rs
+++ b/src/config/node.rs
@@ -4,7 +4,7 @@ use anyhow::{bail, Error};
 use serde::{Deserialize, Serialize};
 
 use proxmox::api::api;
-use proxmox::api::schema::{ApiStringFormat, Updater};
+use proxmox::api::schema::{ApiStringFormat, ApiType, Updater};
 
 use proxmox_http::ProxyConfig;
 
diff --git a/src/server/email_notifications.rs b/src/server/email_notifications.rs
index 2362b673..70830915 100644
--- a/src/server/email_notifications.rs
+++ b/src/server/email_notifications.rs
@@ -4,7 +4,7 @@ use serde_json::json;
 use handlebars::{Handlebars, Helper, Context, RenderError, RenderContext, Output, HelperResult, TemplateError};
 
 use proxmox::tools::email::sendmail;
-use proxmox::api::schema::parse_property_string;
+use proxmox::api::schema::{ApiType, parse_property_string};
 use proxmox::try_block;
 
 use pbs_tools::format::HumanByte;
diff --git a/src/tools/config.rs b/src/tools/config.rs
index 499bd187..f908d67c 100644
--- a/src/tools/config.rs
+++ b/src/tools/config.rs
@@ -152,6 +152,8 @@ fn object_to_writer(output: &mut dyn Write, object: &Object) -> Result<(), Error
 
 #[test]
 fn test() {
+    use proxmox::api::schema::ApiType;
+
     // let's just reuse some schema we actually have available:
     use crate::config::node::NodeConfig;