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

Possible null reference return.

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.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Possible null reference return.

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

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