Provide openai-key support from config (#1052)

embedchain/embedder/openai.py

@@ -16,16 +16,18 @@ class OpenAIEmbedder(BaseEmbedder):
         if self.config.model is None:
             self.config.model = "text-embedding-ada-002"
 
+        api_key = self.config.api_key or os.environ["OPENAI_API_KEY"]
+
         if self.config.deployment_name:
             embeddings = AzureOpenAIEmbeddings(deployment=self.config.deployment_name)
             embedding_fn = BaseEmbedder._langchain_default_concept(embeddings)
         else:
-            if os.getenv("OPENAI_API_KEY") is None and os.getenv("OPENAI_ORGANIZATION") is None:
+            if api_key is None and os.getenv("OPENAI_ORGANIZATION") is None:
                 raise ValueError(
                     "OPENAI_API_KEY or OPENAI_ORGANIZATION environment variables not provided"
                 )  # noqa:E501
             embedding_fn = OpenAIEmbeddingFunction(
-                api_key=os.getenv("OPENAI_API_KEY"),
+                api_key=api_key,
                 organization_id=os.getenv("OPENAI_ORGANIZATION"),
                 model_name=self.config.model,
             )