Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

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

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

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

Possible null reference argument for parameter 'connectionString' in 'DbContextOptionsBuilder SqlServerDbContextOptionsExtensions.UseSqlServer(DbContextOptionsBuilder optionsBuilder, string connectionString, Action<SqlServerDbContextOptionsBuilder>? sqlServerOptionsAction = null)'.

Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Dereference of a possibly null reference.

Non-nullable property 'MembershipStart' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.