Issue 1379 patch - Fix MCP server OAuth not working with Visual Studio Code and others with extra grant_types

[automaton82]

Motivation and Context

Visual Studio Code MCP server (and others) inject other grant types in OAuth request that are superfluous and can be ignored. As long as authorization_code and refresh_token are present this should be sufficient to work without erroring out.

How Has This Been Tested?

I tested this locally in Visual Studio Code itself, and was able to have OAuth work successfully with these changes.

Breaking Changes

No breaking changes.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[automaton82]

This should solve #1379

[pcarleton]

overall looks good, please add a test to make sure we keep this behavior in any future refactors

[automaton82]

overall looks good, please add a test to make sure we keep this behavior in any future refactors

Thank you @pcarleton. Done in 3b7419e

[automaton82]

Hi just following up @pcarleton @ochafik is there anything else you need to merge this? Let me know happy to help.

Thank you!