Possible null reference return.

The type 'YouTubeSummariser.Services.Configurations.OpenAISettings?' cannot be used as type parameter 'TService' in the generic type or method 'ServiceCollectionServiceExtensions.AddSingleton<TService>(IServiceCollection, TService)'. Nullability of type argument 'YouTubeSummariser.Services.Configurations.OpenAISettings?' doesn't match 'class' constraint.

The type 'YouTubeSummariser.Services.Configurations.PromptSettings?' cannot be used as type parameter 'TService' in the generic type or method 'ServiceCollectionServiceExtensions.AddSingleton<TService>(IServiceCollection, TService)'. Nullability of type argument 'YouTubeSummariser.Services.Configurations.PromptSettings?' doesn't match 'class' constraint.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'uriString' in 'Uri.Uri(string uriString)'.

Possible null reference argument for parameter 'key' in 'AzureKeyCredential.AzureKeyCredential(string key)'.

For improved performance, use the LoggerMessage delegates instead of calling 'LoggerExtensions.LogInformation(ILogger, string?, params object?[])' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1848)

For improved performance, use the LoggerMessage delegates instead of calling 'LoggerExtensions.LogError(ILogger, string?, params object?[])' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1848)

For improved performance, use the LoggerMessage delegates instead of calling 'LoggerExtensions.LogError(ILogger, string?, params object?[])' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1848)