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+# Account Subsystem Changelog
+
+## cl.account_os_account.1 Allowing Spaces in App Account Names
+
+Before the change, when an account name containing a space is passed in, an error will be returned. Now, the account names can contain spaces.
+
+**Change Impact**
+
+Applications developed based on earlier versions are not affected.
+From this version, the account names in app account APIs are no longer checked for spaces.
+
+**Key API/Component Changes**
+
+The following APIs are involved:
+- AppAccountManager
+  - createAccount(name: string, callback: AsyncCallback<void>): void;
+  - auth(name: string, owner: string, authType: string, callback: AuthCallback): void;
+  - setAppAccess(name: string, bundleName: string, isAccessible: boolean, callback: AsyncCallback<void>): void;
+  - setCredential(name: string, credentialType: string, credential: string, callback: AsyncCallback<void>): void;
+  - setCustomData(name: string, key: string, value: string, callback: AsyncCallback<void>): void;
+  - setAuthToken(name: string, authType: string, token: string, callback: AsyncCallback<void>): void;
+  - setAuthTokenVisibility(name: string, authType: string, bundleName: string, isVisible: boolean, callback: AsyncCallback<void>): void;