'Program.Program()': new protected member declared in sealed type

Cannot convert null literal to non-nullable reference type.

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

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

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

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

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