This is not currently supported.
I would be a little apprehensive to add this feature because this would dramatically decrease the security of a site.
I appreciate there are times when this would be deemed acceptable if no personal identifiable data could be viewed in the platform and the product owner was content with the hugely increased risk of people gaining access.
The other issue is that a password is not a unique identifier and WordPress requires a username to login.
You could make it so that everyone logs in as the same user but future issues with this depend on what functionality exist on the site regarding user control.
I guess that my current standing is that this is quite a unique use case and I would be uncomfortable making this a general setting as I would not want to encourage users to do this. Again, I do appreciate your use case may justify it.
At the moment I would say that if your use case does justify the drop in security and functionality that would come with it, you should get a developer to custom code this for you.
Always happy to discuss further, these are just my initial thoughts. ??