just a heads up, casting `as string` isn't safe since the request param could turn out to be an array. If the request ends up with the query param as an array,

just a heads up, casting `as string` isn't safe since the request param could turn out to be an array. If the request ends up with the query param as an array, there isn't a runtime to validate the cast and now the variable is typed as `string` but is actually `string[]`. I think a safer approach is to use a validation library or refine the type with an if stmt and returning an error when it isn't a string. I use the following lint to prevent all casts except `as const`: https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/consistent-type-assertions.md https://github.com/typescript-eslint/typescript-eslint/blob/...