I am using a free account of infura to look at the features of infura as I am new to this. For this purpose I was trying to deploy a smart contract to polygon matic mumbai testnet. using brownie. On deployment I am getting the following error
HTTPError: 403 Client Error: Forbidden for url: https://polygon-mumbai.infura.io/v3/INFURA_PROJECT_ID
What is the reason for this error and how can I fix this.