Optional clientOptional codeOptional codeThe code verifier (optional for PKCE in AUTHORIZATION_CODE grant).
The OAuth2 grant type (e.g., AUTHORIZATION_CODE or REFRESH_TOKEN).
Optional redirectThe redirect URI (optional for AUTHORIZATION_CODE grant).
Optional refreshThe refresh token (required for REFRESH_TOKEN grant).
The OAuth2 grant type (e.g., AUTHORIZATION_CODE or REFRESH_TOKEN).