Creaking sound when pedalling

I bought my bike new 3 weeks ago and I’ve been commuting daily since. It’s done about 150 miles (240km) total. So far it’s been good but lately I’ve been hearing a creaking/clicking sound whenever I apply more pressure on my left pedal. The right pedal makes a similar sound albeit not as loud. I’m trying to figure out which component is causing the noise.

I think can rule out the seat as I was able to recreate the noise by pushing down hard on the left pedal when the bike is motionless. Can someone help me identify potential causes of the noise?