Issue Passing in Credential to VertexAI model

[jmho]

System Info

langchain==0.0.180
google-cloud-aiplatform==1.25.0

Have Google Cloud CLI and ran and logged in using gcloud auth login

Running locally and online in Google Colab

Who can help?

@hwchase17 @hwchase17 @agola11

Information

• The official example notebooks/scripts
• My own modified scripts

Related Components

• LLMs/Chat Models
• Embedding Models
• Prompts / Prompt Templates / Prompt Selectors
• Output Parsers
• Document Loaders
• Vector Stores / Retrievers
• Memory
• Agents / Agent Executors
• Tools / Toolkits
• Chains
• Callbacks/Tracing
• Async

Reproduction

https://colab.research.google.com/drive/19QGMptiCn49fu4i5ZQ0ygfR74ktQFQlb?usp=sharing

Unexpected behaviorfield "credentials" not yet prepared so type is still a ForwardRef, you might need to call VertexAI.update_forward_refs(). seems to only appear if you pass in any credenitial valid or invalid to the vertexai wrapper from langchain.

The error

This code should not throw field "credentials" not yet prepared so type is still a ForwardRef, you might need to call VertexAI.update_forward_refs().. It should either not throw any errors, if the credentials, project_Id, and location are correct. Or, if there is an issue with one of params, it should throw a specific error from the vertexai.init call below but it doesn't seem to be reaching it if a credential is passed in.

vertexai.init(project=project_id,location=location,credentials=credentials,)