update single account pinia state

src/stores/acctMgmt.js

@@ -225,5 +225,16 @@ export default defineStore('acctMgmtStore', {
     setShouldUpdateList(shouldUpdateBoolean) {
       this.shouldUpdateList = shouldUpdateBoolean;
     },
+    /** Only update one single account in the pinia state.
+     * @param {object} userDataToReplace
+     */
+    updateSingleAccountPiniaState(userDataToReplace){
+      const userIndex = this.allUserAccoutList.findIndex(user => user.username === userDataToReplace.username);
+      if (userIndex !== -1) {
+        this.allUserAccoutList[userIndex] = { ...this.allUserAccoutList[userIndex], ...userDataToReplace };
+      } else {
+        // Error handling here.
+      }
+    }
   },
 })