Cannot assign null or empty value for authType configuration

[Lytan89]

Environment

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• Operating System: Darwin
• Node Version: v18.15.0
• Nuxt Version: 3.12.4
• CLI Version: 3.12.0
• Nitro Version: 2.9.7
• Package Manager: pnpm@8.12.1
• Builder: -
• User Config: runtimeConfig, devtools, ssr, modules, apollo, css, build, vite, app, imports, compatibilityDate
• Runtime Modules: @nuxtjs/apollo@5.0.0-alpha.9, @pinia/nuxt@0.4.11, ()

• Build Modules: -

Describe the bug

When I was trying to set empty or null value for authType, it returns me error of 'Cannot convert undefined or null to object' and the error seems causing by serializeConfig function. This issue seems working fine with @nuxtjs/apollo@5.0.0-alpha.8 but not for the release after this.

Expected behaviour

I should be able to set empty/null value for authType.

Reproduction

No response

Additional context

No response

Logs

No response