This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

'ISystemClock' is obsolete: 'Use TimeProvider instead.'

'AuthenticationHandler<CustomAuthenticationOptions>.AuthenticationHandler(IOptionsMonitor<CustomAuthenticationOptions>, ILoggerFactory, UrlEncoder, ISystemClock)' is obsolete: 'ISystemClock is obsolete, use TimeProvider on AuthenticationSchemeOptions instead.'

'RNGCryptoServiceProvider' is obsolete: 'RNGCryptoServiceProvider is obsolete. To generate a random number, use one of the RandomNumberGenerator static methods instead.' (https://aka.ms/dotnet-warnings/SYSLIB0023)

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

'JsonSerializerOptions.IgnoreNullValues' is obsolete: 'JsonSerializerOptions.IgnoreNullValues is obsolete. To ignore null values when serializing, set DefaultIgnoreCondition to JsonIgnoreCondition.WhenWritingNull.' (https://aka.ms/dotnet-warnings/SYSLIB0020)

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Number of parameters supplied in the logging message template do not match the number of named placeholders (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2017)