How to verify a Korean plastic surgeon credentials and reviews?

There are so many clinics advertising in Korea and it is hard to know which are legitimate and which are just good at marketing. How can I verify a Korean plastic surgeon credentials? Is there a government database I can check? I have heard about board certification in Korea - what should I look for? Also, how reliable are the reviews and before/after photos on clinic websites? Are there independent Korean review platforms like RealSelf that I should check? How can I tell if reviews are fake? Any tips for doing proper research before choosing a clinic?