--- ENDPOINT ---
chat.ChatService/ReceiveMessages

--- REQUEST ---
{
  "user": "Alice"
}

--- RESPONSE ---
{
  "from": "Server",
  "text": "Welcome!"
}
--- RESPONSE ---
{
  "from": "Server",
  "text": "Message 1"
}
--- RESPONSE ---
{
  "from": "Server",
  "text": "Message 2"
}
