Changes to Create a new custom MCP server with multiple apps

endpoint deprecated

added the non-success response with the status 404

added the non-success response with the status 409

the endpoint scheme security CookieAuth was removed from the API

the endpoint scheme security UserApiKeyAuth was removed from the API

the endpoint scheme security UserApiKeyAuth was added to the API

added the required property error/slug to the response with the 400 status

added the required property error/slug to the response with the 401 status

added the required property error/slug to the response with the 403 status

added the required property error/slug to the response with the 500 status