Discard duplicate collection name from account serialization

Signed-off-by: Christopher Ng <chrng8@gmail.com>

Author: Pytal

lib/private/Accounts/Account.php

@@ -104,9 +104,16 @@ public function getFilteredProperties(string $scope = null, string $verified = n
 		return $result;
 	}
 
-	/** @return IAccountPropertyCollection[]|IAccountProperty[] */
+	/** @return array<string, IAccountProperty|array<int, IAccountProperty>> */
 	public function jsonSerialize(): array {
-		return $this->properties;
+		$properties = $this->properties;
+		foreach ($properties as $propertyName => $propertyObject) {
+			if ($propertyObject instanceof IAccountPropertyCollection) {
+				// Override collection serialization to discard duplicate name
+				$properties[$propertyName] = $propertyObject->jsonSerialize()[$propertyName];
+			}
+		}
+		return $properties;
 	}
 
 	public function getUser(): IUser {