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

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

Possible null reference assignment.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Non-nullable property 'Server' 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.

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

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