[Bug]: auth_username and auth_password not getting set in GET /gateways/<gateway_id> API

[madhav165]

🐞 Bug Summary

auth_username and auth_password not set in response to GET /gateways/<gateway_id> API

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🧩 Affected Component

Select the area of the project impacted:

• mcpgateway - API

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🔁 Steps to Reproduce

1. Add gateway with basic auth
2. Get gateway from API /gateways/<gateway_id>
3. auth_username, auth_password in response are blank

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🤔 Expected Behavior

Response should have auth_username, auth_password set.

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