Created by: nathanforce
This PR updates the codegen template to use body for the body param in the generated API calls instead of a unique name based on the Python code. This should not have any impact other than aesthetics where the param names could become very long, especially in the case of Union input params where the name was formed by concatenating each member of the union, resulting in names like userPaymentMethodUpdateBankAccountVerificationRequestUserPaymentMethodUpdateFundingAttestationRequest.