fix: use init api key for openai embeddings (#1324)

.changeset/pretty-keys-greet.md

+---
+"@llamaindex/openai": patch
+"llamaindex": patch
+---
+
+fix: take init api key into account

packages/llm/openai/src/embedding.ts

@@ -114,7 +114,8 @@ export class OpenAIEmbedding extends BaseEmbedding {
             }),
         );
     } else {
-      this.apiKey = init?.session?.apiKey ?? getEnv("OPENAI_API_KEY");
+      this.apiKey =
+        init?.session?.apiKey ?? init?.apiKey ?? getEnv("OPENAI_API_KEY");
       this.lazySession = async () =>
         import("openai").then(({ OpenAI }) => {
           return (