Please solve the programming task below using a self-contained code snippet in a markdown code block.

There is an undirected star graph consisting of n nodes labeled from 1 to n. A star graph is a graph where there is one center node and exactly n - 1 edges that connect the center node with every other node.
You are given a 2D integer array edges where each edges[i] = [ui, vi] indicates that there is an edge between the nodes ui and vi. Return the center of the given star graph.
 
Please complete the following python code precisely:
```python
class Solution:
    def findCenter(self, edges: List[List[int]]) -> int:
```