diff --git a/web/database/utils/constants.js b/web/database/utils/constants.js
--- a/web/database/utils/constants.js
+++ b/web/database/utils/constants.js
@@ -2,3 +2,5 @@
 
 export const SQLITE_CONTENT = 'sqliteFileContent';
 export const SQLITE_ENCRYPTION_KEY = 'encryptionKey';
+
+export const CURRENT_USER_ID_KEY = 'current_user_id';
diff --git a/web/database/worker/db-worker.js b/web/database/worker/db-worker.js
--- a/web/database/worker/db-worker.js
+++ b/web/database/worker/db-worker.js
@@ -24,7 +24,12 @@
   removeAllDrafts,
   updateDraft,
 } from '../queries/draft-queries.js';
-import { SQLITE_CONTENT, SQLITE_ENCRYPTION_KEY } from '../utils/constants.js';
+import { getMetadata, setMetadata } from '../queries/metadata-queries.js';
+import {
+  CURRENT_USER_ID_KEY,
+  SQLITE_CONTENT,
+  SQLITE_ENCRYPTION_KEY,
+} from '../utils/constants.js';
 import { generateDatabaseCryptoKey } from '../utils/worker-crypto-utils.js';
 
 const localforageConfig: PartialConfig = {
@@ -124,6 +129,21 @@
       type: workerResponseMessageTypes.CLIENT_STORE,
       store: getClientStore(),
     };
+  } else if (message.type === workerRequestMessageTypes.SET_CURRENT_USER_ID) {
+    if (!sqliteDb) {
+      throw new Error('Database not initialized');
+    }
+    setMetadata(sqliteDb, CURRENT_USER_ID_KEY, message.userID);
+    return;
+  } else if (message.type === workerRequestMessageTypes.GET_CURRENT_USER_ID) {
+    if (!sqliteDb) {
+      throw new Error('Database not initialized');
+    }
+    const userID = getMetadata(sqliteDb, CURRENT_USER_ID_KEY);
+    return {
+      type: workerResponseMessageTypes.GET_CURRENT_USER_ID,
+      userID,
+    };
   }
 
   throw new Error('Request type not supported');
diff --git a/web/types/worker-types.js b/web/types/worker-types.js
--- a/web/types/worker-types.js
+++ b/web/types/worker-types.js
@@ -12,6 +12,8 @@
   GENERATE_DATABASE_ENCRYPTION_KEY: 2,
   PROCESS_STORE_OPERATIONS: 3,
   GET_CLIENT_STORE: 4,
+  SET_CURRENT_USER_ID: 5,
+  GET_CURRENT_USER_ID: 6,
 });
 
 export type PingWorkerRequestMessage = {
@@ -38,12 +40,23 @@
   +type: 4,
 };
 
+export type SetCurrentUserIDRequestMessage = {
+  +type: 5,
+  +userID: string,
+};
+
+export type GetCurrentUserIDRequestMessage = {
+  +type: 6,
+};
+
 export type WorkerRequestMessage =
   | PingWorkerRequestMessage
   | InitWorkerRequestMessage
   | GenerateDatabaseEncryptionKeyRequestMessage
   | ProcessStoreOperationsRequestMessage
-  | GetClientStoreRequestMessage;
+  | GetClientStoreRequestMessage
+  | SetCurrentUserIDRequestMessage
+  | GetCurrentUserIDRequestMessage;
 
 export type WorkerRequestProxyMessage = {
   +id: number,
@@ -54,6 +67,7 @@
 export const workerResponseMessageTypes = Object.freeze({
   PONG: 0,
   CLIENT_STORE: 1,
+  GET_CURRENT_USER_ID: 2,
 });
 
 export type PongWorkerResponseMessage = {
@@ -66,9 +80,15 @@
   +store: ClientDBStore,
 };
 
+export type GetCurrentUserIDResponseMessage = {
+  +type: 2,
+  +userID: ?string,
+};
+
 export type WorkerResponseMessage =
   | PongWorkerResponseMessage
-  | ClientStoreResponseMessage;
+  | ClientStoreResponseMessage
+  | GetCurrentUserIDResponseMessage;
 
 export type WorkerResponseProxyMessage = {
   +id?: number,