feat(backend): Add support for User locale

.changeset/calm-brooms-grab.md

@@ -0,0 +1,5 @@
+---
+'@clerk/backend': minor
+---
+
+Added support for User `locale`

packages/backend/src/api/endpoints/UserApi.ts

@@ -81,6 +81,8 @@ type CreateUserParams = {
   password?: string;
   firstName?: string;
   lastName?: string;
+  /** The locale of the user in BCP-47 format. */
+  locale?: string;
   skipPasswordChecks?: boolean;
   skipPasswordRequirement?: boolean;
   skipLegalChecks?: boolean;
@@ -149,6 +151,9 @@ type UpdateUserParams = {
   /** A custom timestamp denoting when the user accepted legal requirements, specified in RFC3339 format (e.g. 2012-10-20T07:15:20.902Z). */
   legalAcceptedAt?: Date;
 
+  /** The locale of the user in BCP-47 format. */
+  locale?: string;
+
   /** If true, the user can delete themselves with the Frontend API. */
   deleteSelfEnabled?: boolean;
 

packages/backend/src/api/resources/JSON.ts

@@ -606,6 +606,7 @@ export interface UserJSON extends ClerkResourceJSON {
   create_organizations_limit: number | null;
   delete_self_enabled: boolean;
   legal_accepted_at: number | null;
+  locale: string | null;
 }
 
 export interface VerificationJSON extends ClerkResourceJSON {

packages/backend/src/api/resources/User.ts

@@ -144,6 +144,11 @@ export class User {
      * The unix timestamp of when the user accepted the legal requirements. `null` if [**Require express consent to legal documents**](https://clerk.com/docs/guides/secure/legal-compliance) is not enabled.
      */
     readonly legalAcceptedAt: number | null,
+
+    /**
+     * The locale of the user.
+     */
+    readonly locale: string | null,
   ) {}
 
   static fromJSON(data: UserJSON): User {
@@ -180,6 +185,7 @@ export class User {
       data.create_organizations_limit,
       data.delete_self_enabled,
       data.legal_accepted_at,
+      data.locale,
     );
     res._raw = data;
     return res;