Create conversation session

Conversation tokens allow client-side applications to create a unique, authenticated credential for each conversation. This token can be used to interact with the conversation/{conversationId}/send, conversation/{conversationId}/receive, and conversation/{conversationId}/message/create routes. By creating an individual token for each conversation, a client-side application is able to directly access and manipulate the conversation through these routes. Without conversation tokens, a client-side application would need to authenticate and access conversation routes through a server-side application, which can be more complex and require additional infrastructure. By providing a way for client-side applications to authenticate and access the conversation routes directly, the token route simplifies the process of integrating with the API and makes it more convenient for developers to build AI applications.