refactor: Use config and tokens for Copilot API requests

Author: ericc-ch

src/services/copilot/chat-completions/service-streaming.ts

@@ -1,10 +1,16 @@
+import { stream } from "fetch-event-stream"
+
 import type { ChatCompletionsPayload } from "./types"
-import type { ChatCompletionsChunk } from "./types-streaming"
 
-import { copilot } from "../../api-instance"
+import { COPILOT_CONFIG } from "../../../config/api"
+import { TOKENS } from "../../../config/tokens"
 
-export const chatCompletionsStream = (payload: ChatCompletionsPayload) =>
-  copilot<ChatCompletionsChunk>("/chat/completions", {
+export const chatCompletionsStream = async (payload: ChatCompletionsPayload) =>
+  stream(`${COPILOT_CONFIG.baseURL}/chat/completions`, {
     method: "POST",
-    body: payload,
+    headers: {
+      ...COPILOT_CONFIG.headers,
+      authorization: `Bearer ${TOKENS.COPILOT_TOKEN}`,
+    },
+    body: JSON.stringify(payload),
   })