Hi, new here. The test Chatbot i created today, takes information, connects to Zaiper then Google sheets and works great. Query. I want to create a ChatGPT persona so i can give it a command to write in a certain style and other instructions. Just watched a youtube video and it seems the only way to truely get this right is building the persona in Stack Ai, connect that to the front facing Botpress chatbot. is this correct? if so is there an alternative to Stack Ai as the costs are high for that. any help appreciated