how enter custom openai url?

[lexasub]

Describe the bug
A clear and concise description of the bug: Users are unable to enter a custom OpenAI URL due to missing or unclear interface prompts.

To Reproduce
Steps to reproduce the behavior:

Go to the application settings page.
Click on 'API Settings' or the equivalent tab.
Attempt to find or enter a custom OpenAI URL field.
Expected behavior
The user should be able to see a clear and accessible input field designated for entering a custom OpenAI URL. Upon entering the URL and submitting, the application should accept it without errors.