Nullability of reference types in return type of 'Task<ProviderConfiguration> InMemoryProviderConfigurationRepository.GetConfigurationSettingsAsync(string name, CancellationToken cancellationToken = default(CancellationToken))' doesn't match implicitly implemented member 'Task<ProviderConfiguration?> IProviderConfigurationRepository.GetConfigurationSettingsAsync(string name, CancellationToken cancellationToken = default(CancellationToken))'.

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.

Converting null literal or possible null value to non-nullable type.

Dereference of a possibly null reference.

Non-nullable field '_Config' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Possible null reference assignment.

Possible null reference assignment.

Non-nullable property 'ClientId' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'ClientSecret' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.