Trying to fine-tune gfpgan

I wanted to increase the accuracy and train gfpgan on a particular lighting dataset to increase the details and lighting scenario of image precision But I am new to this and got stuck as again and again the error occurs that Gfpganer has no parameter I tried to do the same with calling various like generator and discriminator but it just didn't work can any one tell me like how to actually FINETUNE a GFPGAN with new dataset