Nullability of reference types in return type of 'ValueTask<object> TokenFilter.InvokeMethodAsync(HubInvocationContext invocationContext, Func<HubInvocationContext, ValueTask<object>> next)' doesn't match implicitly implemented member 'ValueTask<object?> IHubFilter.InvokeMethodAsync(HubInvocationContext invocationContext, Func<HubInvocationContext, ValueTask<object?>> next)'.

Nullability of reference types in type of parameter 'exception' of 'Task TokenFilter.OnDisconnectedAsync(HubLifetimeContext context, Exception exception, Func<HubLifetimeContext, Exception, Task> next)' doesn't match implicitly implemented member 'Task IHubFilter.OnDisconnectedAsync(HubLifetimeContext context, Exception? exception, Func<HubLifetimeContext, Exception?, Task> next)' (possibly because of nullability attributes).

The type name 'init' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'init' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'lastpinged' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'lastpinged' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'user' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'user' only contains lower-cased ascii characters. Such names may become reserved for the language.

Non-nullable property 'SessionId' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

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

The "--output" option isn't supported when building a solution. Specifying a solution-level output path results in all projects copying outputs to the same directory, which can lead to inconsistent builds.